A special glass furnace

Abstract

This invention belongs to the field of glass production technology, specifically relating to a special glass furnace. The special glass furnace includes a rectangular molten glass pool and a furnace body connected above it. The furnace body has a feeding port, and the molten glass pool has a discharge port. The bottom of the molten glass pool is equipped with at least one kiln sill, dividing the pool along its length into an upstream functional area near the feeding port and a downstream functional area near the discharge port. Multiple sets of bubbling devices are installed in the upstream functional area. This invention achieves physical zoning of the process through the kiln sill. The upstream functional area can complete melting, homogenization, and bubble removal, while the downstream functional area can complete settling and clarification before discharge, preventing unmelted impurities from mixing into the finished product, thus improving the quality of the molten glass and meeting the production needs of large-scale special glass furnaces.

Description

Technical Field

[0001] This invention relates to the field of glass production technology, and specifically to a special glass furnace. Background Technology

[0002] With technological advancements, the demand for specialty glass in the display materials industry is increasing, along with ever-higher quality requirements. Against this backdrop, specialty glass production furnaces are gradually evolving towards larger scale and higher efficiency to meet the dual demands of large-scale production and high-quality manufacturing. Traditional specialty glass furnaces are characterized by their small size and precision, typically employing a polygonal electric melting furnace structure. While this structure offers relatively controllable process stability in small-scale production, it suffers from drawbacks such as a small melting area and low single-furnace output, failing to meet the growing market demand. Simply increasing the geometric dimensions of the polygonal furnace to improve output would lead to severe disruption of the glass melt flow field within the furnace, significantly reducing melting efficiency and homogenization, making it difficult to stably control process parameters, and ultimately resulting in compromised product quality.

[0003] Chinese patent application CN112723716A discloses a gas-electric hybrid furnace and its design method. The furnace utilizes side wall bricks, rear wall bricks, and front wall bricks to form a rectangular furnace pool. Several electrode bricks are symmetrically arranged on the side walls of the furnace pool, and combustion lances pointing inwards are mounted on the breast wall above the furnace pool. This gas-electric hybrid furnace overcomes the limitations of traditional polygonal structures in terms of scale expansion, facilitating linear scaling of the overall furnace size and rational arrangement of process equipment. In terms of heating, the gas-electric hybrid furnace employs a composite heating process combining flame heating and electric melting. Multiple sets of combustion lances and electrode bricks are symmetrically arranged on the side walls of the furnace. Through the synergistic effect of upper flame space heating and lower direct heating of the molten glass, the overall heating efficiency and temperature uniformity of the furnace are improved. Meanwhile, the gas-electric hybrid furnace is equipped with multiple thermocouples at the bottom of the pool to monitor the temperature of the molten glass in real time, and a discharge port is set at the bottom of the rear pool wall to transport the molten glass to the subsequent forming process. This improves the production efficiency and process control precision of the glass furnace to a certain extent, and provides a feasible technical approach for the large-scale design of special glass furnaces.

[0004] However, the aforementioned gas-electric hybrid furnace adopts an unobstructed, straight-through large pool design, lacking physical blocking and zoning intervention for the flow of molten glass. The area of ​​intense melting of the glass batch and the area of ​​settling and clarifying of high-quality molten glass are interconnected. This easily leads to incompletely melted substances and tiny bubbles being directly mixed into the effluent along with internal backflow, making it difficult to guarantee the deep homogenization effect of the molten glass and meet the production requirements of high-quality special glass. Summary of the Invention

[0005] The purpose of this invention is to propose a special glass furnace to solve the technical problem that existing special glass furnaces cannot guarantee the quality of molten glass, thus making it difficult to meet the requirements for high-quality special glass production.

[0006] To solve the above-mentioned technical problems, the present invention provides a special glass furnace as follows: A special glass furnace includes a rectangular glass melt pool and a furnace body connected above the glass melt pool. The furnace body is provided with a feeding port, and the glass melt pool is provided with a discharge port. The bottom of the glass melt pool is provided with at least one furnace sill to divide the glass melt pool along its length into an upstream functional area near the feeding port and a downstream functional area near the discharge port. The upstream functional area is provided with multiple sets of bubbling devices. The upstream functional area is used for melting glass batches, homogenizing glass melt, and debubbling. The downstream functional area is used for settling and clarifying glass melt and discharging.

[0007] The beneficial effects of this invention are as follows: By setting a kiln sill at the bottom of a rectangular glass melt pool, the invention divides the glass melt pool into upstream and downstream functional zones, achieving physical zoning of the glass melt processing process. The upstream functional zone is equipped with a bubbling device to fully stir the glass batch material, accelerating the melting process and promoting the homogenization of the glass melt's composition and temperature, while also expelling air bubbles from within the glass melt. The downstream functional zone does not have a bubbling device, preventing external disturbances to the glass melt's flow and ensuring a stable, static state after entering the downstream functional zone. The kiln sill itself forms a physical barrier, preventing incompletely melted materials from entering the downstream functional zone, thus preventing impurities from contaminating the finished glass melt and ensuring the quality of the output glass melt. This invention solves the problems of poor homogenization and easy contamination of impurities in existing straight-through kilns where the melting and refining zones are interconnected. Furthermore, the rectangular glass melt pool structure facilitates linear expansion of the kiln scale, adapting to the needs of large-scale production.

[0008] Furthermore, two parallel sills are arranged along the length of the glass melt pool to divide the upstream functional area into a melting and stirring zone and a deep homogenization and defoaming zone. Both the melting and stirring zone and the deep homogenization and defoaming zone are equipped with the bubble-blowing device.

[0009] Beneficial effects: It can achieve complete separation of the three processes of melting, homogenization and debubbling, and settling and clarification. Each functional area can be independently adapted to the process parameters of the corresponding process, and different processes do not interfere with each other. The melting and stirring zone can complete the rapid melting and initial debubbling of the batch material. The deep homogenization and debubbling zone can further stir and homogenize the initially molten glass, thoroughly remove the tiny bubbles remaining in the glass, and further improve the uniformity and purity of the glass. The zoned design can greatly improve the process controllability of large furnaces.

[0010] Furthermore, the lengths of the melting and stirring zone, the deep homogenization and defoaming zone, and the downstream functional zone increase sequentially along the length of the glass melt pool.

[0011] Beneficial effects: It allows the residence time of molten glass in each functional zone to match the processing requirements of the corresponding process. After the batch material is rapidly melted in the melting and stirring zone, it can be fully homogenized and de-bubbled in the longer homogenization and de-bubbling zone. Finally, it can be fully settled, clarified and temperature adjusted in the longest downstream functional zone, ensuring that the processing of molten glass is complete and avoids the problem of incomplete processing due to insufficient residence time, thereby further improving the quality of the finished molten glass.

[0012] Furthermore, the bubbling device is arranged in at least two rows along the length of the glass melt pool, and at least one row of bubbling devices is arranged in both the melting and stirring zone and the deep homogenization and bubble removal zone. Each row of bubbling devices includes multiple bubblers arranged at equal intervals along the width of the glass melt pool.

[0013] Beneficial effects: The stirring action generated by the bubbling device evenly covers the entire cross section of the corresponding functional area, avoiding the formation of stirring dead zones, so that the molten glass in all positions within the corresponding functional area can be fully stirred, thereby improving the uniformity of the molten glass melting and homogenization process.

[0014] Furthermore, the bottom of the glass melt pool is provided with discharge ports corresponding to the melting and stirring zone, the deep homogenization and defoaming zone, and the downstream functional zone, and each discharge port is located on the center line of the bottom of the pool; the discharge ports located in the melting and stirring zone and the deep homogenization and defoaming zone can be interchanged with the corresponding bubbling devices.

[0015] Beneficial effects: The discharge port can independently discharge the molten glass from each functional zone when the kiln malfunctions or needs maintenance, avoiding mutual interference between the molten glass from different functional zones; the discharge ports located in the melting and stirring zone and the deep homogenization and debubbling zone can be interchanged with the corresponding bubbling devices, eliminating the need to open extra holes in the bottom of the pool, reducing structural weak points in the bottom of the pool, and improving the structural stability and sealing of the kiln pool bottom.

[0016] Furthermore, it also includes a heating system, which comprises several pairs of oxygen-fired combustion devices and several pairs of electrode heating devices. The oxygen-fired combustion devices are symmetrically arranged on the corresponding side walls on both sides of the furnace body, and the electrode heating devices are symmetrically arranged on the corresponding pool walls on both sides of the glass melt pool.

[0017] Beneficial effects: The combination of electrode heating and all-oxygen combustion heating can meet the multiple requirements of special glass production for temperature uniformity, melting efficiency, product quality and process flexibility.

[0018] Furthermore, process holes are provided on the corresponding walls of the furnace body, and a sealing structure is provided at each process hole; the sealing structure includes refractory bricks and a support frame assembled together, the refractory bricks are adapted to the size of the process holes, and the support frame is connected to a remote operating mechanism, which is used to rotate the support frame around an axis perpendicular to the center line of the process hole, so that the refractory bricks are sealed and inserted into or removed from the process hole.

[0019] Beneficial effects: The refractory bricks are in direct contact with the internal environment of the kiln, which can prevent metal parts from directly contacting the high-temperature environment inside the kiln, thereby preventing metal impurities from entering the molten glass; the support frame is connected to a remote operating mechanism, which can drive the support frame to rotate, thereby causing the refractory bricks to rotate, achieving the sealing insertion or removal of process holes. Operators can complete the opening and closing of process holes without close contact with the high-temperature holes, reducing the labor intensity of operators, avoiding the risk of burns, and improving the safety of operation.

[0020] Furthermore, a base support is fixed on the outside of the furnace body, and the support frame is rotatably assembled with the base support through a hanging assembly; a clamping component is rotatably assembled on the base support through an axis parallel to the center line of the process hole, and a slot matching the clamping component is also fixed on the base support. When the clamping component rotates to the slot, it presses the refractory brick into the process hole.

[0021] Beneficial effects: The clamping component can apply a stable clamping force to the refractory bricks, making the refractory bricks fit tightly with the process holes, further improving the sealing effect of the process holes, preventing the leakage of high-temperature gas inside the kiln, and ensuring the stability of the process environment inside the kiln; at the same time, the clamping component uses a rotating method to clamp and release the clamping, making the operation more convenient.

[0022] Furthermore, the hanging assembly includes an upper connector and a lower connector. The upper connector is fixed to the base support, and the lower connector is fixed to the support frame. The upper connector and the lower connector are hinged together by high-strength bolts.

[0023] Beneficial effects: It can ensure the connection strength between the support frame and the foundation support, and also enable the support frame to rotate flexibly, ensuring the smoothness of the refractory brick turning process.

[0024] Furthermore, the support frame has a connecting part, and the remote operating mechanism includes a flexible operating component and a guide component that guides and cooperates with the flexible operating component; one end of the flexible operating component is fixed to the connecting part, and the other end is the operating end. When the flexible operating component is pulled, it drives the refractory brick to flip so as to open and close the process hole.

[0025] Beneficial effects: Operators can pull the flexible operating component from a position away from the high-temperature holes to rotate the refractory bricks and open and close the process holes, further improving the convenience and safety of operation; the transmission process of the flexible operating component is stable and reliable, which can ensure the smoothness of the opening and closing process of the refractory bricks and avoid the problem of collision and damage to the refractory bricks during movement. Attached Figure Description

[0026] Figure 1 This is a schematic longitudinal section of the special glass furnace of the present invention; Figure 2 for Figure 1 MM section view; Figure 3 for Figure 1 NN cross-sectional view; Figure 4 This is a schematic diagram of the sealing structure on the special glass furnace of the present invention; Figure 5 for Figure 4 AA section view; Figure 6 for Figure 4 BB cross-sectional view; Figure 7 for Figure 4 CC section view; Figure 8 for Figure 4 DD sectional view.

[0027] Explanation of reference numerals in the attached figures: 1. Furnace body; 101. Main arch; 1011. Arch top thermocouple; 1012. Arch top flue gas outlet; 102. Discharge end gable wall; 1021. Process opening; 103. Charging end gable wall; 1031. Charging end gable wall flue gas outlet; 1032. Charging port; 104. Kiln side wall; 105. All-oxygen burner brick; 2. Liquid glass tank; 201. Tank bottom; 202. Tank bottom thermocouple; 203. Discharge port; 204. Tank wall; 205. Discharge port; 206. Kiln sill; 207. Electrode brick; 208. Bubbler; 3. Smoke exhaust system; 301. Smoke exhaust pipe at the arch; 302. First valve; 303. Smoke exhaust pipe at the feeding end gable wall; 304. Second valve; 305. Chimney; 4. Sealing structure; 401. Foundation support; 402. Support frame; 403. Clamping parts; 404. Hanging assembly; 4041. Upper connector; 4042. Lower connector; 4043. High-strength bolt; 405. Connecting part; 406. Rotating shaft; 407. Slot; 408. Refractory brick; 409. Heat-resistant bolt; 410. Steel wire rope; 411. Guide pulley. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] An embodiment of a special glass furnace provided by the present invention: like Figure 1 , Figure 2 and Figure 3 As shown, the special glass furnace adopts a rectangular structure, including a glass liquid pool 2, a furnace body 1 fixedly connected above the glass liquid pool 2, a heating system providing a heat source for the furnace, a furnace sill 206 set at the bottom of the glass liquid pool 2, a bubbling device arranged inside the glass liquid pool 2, a flue gas system 3 connected to the furnace body 1, a temperature measuring component for detecting furnace operating parameters, and a sealing structure 4 installed on the furnace body 1 at the corresponding process opening 1021. All components are assembled according to the process requirements of special glass production, meeting the needs of large-scale, mass production and high-quality special glass preparation.

[0030] like Figure 2 As shown, the molten glass pool 2 is a rectangular closed cavity formed by a horizontally set pool bottom 201 and vertically fixed pool walls 204, used to contain the high-temperature molten glass during the production process. Figure 1 and Figure 3 As shown, the furnace body 1 is fixedly and sealed to the top of the glass liquid pool 2. The large arch 101 at the top, the discharge end gable wall 102 at the end, the feeding end gable wall 103 at the end, and the kiln side walls 104 on both sides together form a closed flame space. The kiln side walls 104 are sealed together with the discharge end gable wall 102 and the feeding end gable wall 103, together forming a high-temperature combustion chamber.

[0031] like Figure 1 As shown, a feeding port 1032 is provided at the lower part of the feeding end gable wall 103. The number of feeding ports 1032 is determined according to the scale of the kiln, the width of the furnace body 1, and the discharge rate. It is used to feed glass batch materials into the glass melt pool 2. A discharge port 205 is provided at the lower part of the discharge end corresponding to the pool wall 204. The number of discharge ports 205 can be set to 1 to 3 depending on the scale of the kiln. It is used to output the clarified finished glass melt to the subsequent forming process.

[0032] like Figure 2As shown, the kiln sill 206 is fixedly constructed on the bottom 201 of the molten glass pool 2, with each sill 206 extending along the width of the molten glass pool 2. In this embodiment, two kiln sills 206 are provided, arranged parallel to each other along the length of the molten glass pool 2. The two kiln sills 206 sequentially divide the molten glass pool 2 along its length into three independent functional areas: a melting and stirring zone, a deep homogenization and defoaming zone, and a downstream functional area. The melting and stirring zone and the deep homogenization and defoaming zone together constitute the upstream functional area. Among them, the melting and stirring zone is located at the upstream end, close to the feed port 1032; the deep homogenization and defoaming zone is located in the middle; and the downstream functional area is located at the downstream end, close to the discharge port 205. The lengths of the melting and stirring zone, the deep homogenization and defoaming zone, and the downstream functional area increase sequentially along the length of the molten glass pool 2, so that the residence time of the molten glass in each functional area matches the processing requirements of the corresponding process. The kiln sill 206 forms a physical barrier, which on the one hand can prevent unmelted solid materials from entering the downstream area with the liquid flow, thus avoiding impurities from being mixed into the finished glass liquid. On the other hand, it can optimize the flow field distribution inside the glass liquid pool 2, avoid mutual interference between glass liquids from different processes, and improve process controllability.

[0033] The bubbling devices are only installed on the bottom 201 of the glass melt pool in the melting and stirring zone and the deep homogenization and bubble removal zone; no bubbling devices are installed in the downstream functional area. In this embodiment, two rows of bubbling devices are provided, and these two rows of bubbling devices are spaced apart along the length of the glass melt pool 2. One row of bubbling devices is located in the melting and stirring zone, near the feed port 1032; the other row of bubbling devices is located in the deep homogenization and bubble removal zone. Each row of bubbling devices includes multiple bubblers 208 arranged at equal intervals along the width of the glass melt pool 2. The bubblers 208 are existing technology, which generate a stirring effect by continuously introducing gas into the glass melt, accelerating the melting speed of the glass batch, promoting the homogenization of the glass melt composition and temperature, and simultaneously removing bubbles from inside the glass melt. In practical applications, the number of rows of bubbling devices can be reasonably set according to the scale of the furnace, and is not limited to the two rows in this embodiment.

[0034] The bottom 201 of the glass melt tank 2 is equipped with discharge ports 203 at positions corresponding to the melting and stirring zone, the deep homogenization and bubble removal zone, and the downstream functional zone. All discharge ports 203 are located on the center line of the bottom 201, allowing for independent discharge of the glass melt from the corresponding functional zone during kiln maintenance or malfunction. The discharge ports 203 located in the melting and stirring zone and the deep homogenization and bubble removal zone are equipped with interchangeable structures for bubblers 208 and discharge ports 203. The bubblers 208 and discharge ports 203 at corresponding positions can be installed interchangeably, eliminating the need for additional holes in the bottom 201, reducing structural weaknesses, and improving the sealing and structural stability of the bottom 201.

[0035] In this embodiment, the heating system employs a composite heating method combining oxy-fuel combustion and electro-assisted melting, including multiple pairs of oxy-fuel combustion devices and multiple pairs of electrode heating devices. For example... Figure 2 and Figure 3 As shown, the oxy-fuel combustion devices are symmetrically arranged on the kiln side walls 104 on both sides of the furnace body 1 via oxy-fuel burner bricks 105. The number of oxy-fuel burner bricks 105 is determined according to the kiln scale, the length of the kiln side wall 104, and the output rate. In this embodiment, a total of 12 pairs of oxy-fuel combustion devices are set up, and the heating power is adjusted in conjunction with the automatic control system. The flame space inside the furnace body 1 is heated by the flame to provide an upper heat source for the melting of the glass batch. The electrode heating devices are symmetrically arranged on the pool walls 204 on both sides of the glass melt pool 2 via electrode bricks 207. The number of electrode bricks 207 is determined according to the kiln scale, the length of the pool wall 204, and the output rate. In this embodiment, a total of 10 pairs of electrode heating devices are set up, and the heating power is adjusted in conjunction with the automatic control system. The electrodes are directly inserted into the glass melt for heating, improving the temperature uniformity inside the glass melt. The composite heating method can take into account both heating efficiency and temperature uniformity, and is suitable for the process requirements of special glass production.

[0036] It should be noted that the ratio of the number of oxygen-fired devices to electrode heating devices can be adjusted according to the type of glass being produced. For high-melting-point specialty glass, the number of electrode heating devices can be increased to improve the heating efficiency inside the molten glass. For glass types that are easy to clarify, the number of oxygen-fired devices can be reduced to lower production energy consumption.

[0037] like Figure 1 and Figure 2 As shown, the temperature sensing components include a top-mounted thermocouple 1011 and a bottom-mounted thermocouple 202. The top-mounted thermocouple 1011 is mounted on the large arch 101 and is used to monitor the temperature of the flame space inside the furnace body 1 in real time. The bottom-mounted thermocouple 202 is mounted on the bottom 201 of the molten glass pool 2, primarily arranged along the center line of the bottom 201, but can also be arranged in small numbers on both sides of the center line depending on the monitoring requirements. The bottom-mounted thermocouple 202 can adopt a through-hole structure or a blind-hole structure, used for real-time monitoring of the temperature of molten glass in different areas and at different depths. All temperature sensing components are connected to an external automatic control system, providing data support for adjusting the heating power.

[0038] like Figure 1As shown, the exhaust system 3 includes an arch exhaust pipe 301, a first valve 302, a feeding end gable exhaust pipe 303, a second valve 304, and a chimney 305. An arch exhaust outlet 1012 is provided on the main arch 101, and a feeding end gable exhaust outlet 1031 is provided on the feeding end gable 103. The arch exhaust outlet 1012 is connected to the arch exhaust pipe 301, and the feeding end gable exhaust outlet 1031 is connected to the feeding end gable exhaust pipe 303. Each of the two exhaust pipes has an independent first valve 302 and a second valve 304, which ultimately converge and connect to the chimney 305. The exhaust system 3 is used to exhaust the flue gas generated during combustion inside the kiln, and simultaneously regulates the exhaust volume through the valves to control the pressure stability inside the kiln.

[0039] Multiple process holes 1021 are provided on the corresponding walls, such as the discharge end gable wall 102 of the furnace body 1, for daily process operation and observation. Each process hole 1021 is equipped with an independent sealing structure 4. In this embodiment, as shown... Figure 4 As shown, the sealing structure 4 includes a base support 401, a support frame 402, refractory bricks 408, a hanging assembly 404, a clamping component 403, and a remote operating mechanism.

[0040] like Figure 4 and Figure 5 As shown, the base support 401 is welded together using angle steel of different types according to the position and size of the process hole 1021, and is fixedly installed on the kiln side wall 104 on the outside of the furnace body 1. The support frame 402 is welded together using angle steel of corresponding types according to the position and size of the process hole 1021 and the size of the refractory brick 408. The size of the refractory brick 408 is adapted to the size of the hole on the kiln side wall 104, and the material is the same as that of the kiln side wall 104. Heat-resistant bolts 409 are embedded inside the refractory brick 408, and it is fixedly connected to the support frame 402 together by the heat-resistant bolts 409. The refractory brick 408 is used to insert into the process hole 1021 to seal the process hole 1021, avoid direct contact between metal components and the high-temperature environment inside the kiln, and prevent metal impurities from entering the glass melt.

[0041] like Figure 4 and Figure 7 As shown, the support frame 402 is rotatably assembled with the base support 401 via the hanging assembly 404. Specifically, the hanging assembly 404 includes an upper connector 4041 and a lower connector 4042. The upper connector 4041 is welded and fixed to the base support 401, and the lower connector 4042 is welded and fixed to the support frame 402. The upper connector 4041 and the lower connector 4042 are hinged by a high-strength bolt 4043, allowing the support frame 402 and the refractory brick 408 to rotate around the high-strength bolt 4043. The axis of the high-strength bolt 4043 is perpendicular to the center line of the process hole 1021.

[0042] like Figure 6 and Figure 8 As shown, the clamping member 403 is a square steel bar, rotatably assembled with the base support 401 via a rotating shaft 406. The axis of the rotating shaft 406 is parallel to the center line of the process hole 1021. In this embodiment, the rotating shaft 406 is a screw passing through the base support 401 and the clamping member 403, with a nut attached to the screw. A groove 407 matching the clamping member 403 is fixed on the base support 401, and the groove 407 is formed by welding angle steel onto the base support 401. When the clamping member 403 rotates into the groove 407, a stable clamping force can be applied to the support frame 402, causing the refractory brick 408 to be tightly inserted into the process hole 1021 to achieve a seal.

[0043] like Figure 7 As shown, the remote operating mechanism includes a flexible operating component and a guide component. The flexible operating component is a steel wire rope 410, and the guide component is a fixedly installed guide pulley 411. A connecting part 405 is provided on the support frame 402, which is an ear plate with a steel wire rope hole. One end of the steel wire rope 410 is inserted into the steel wire rope hole and fixed, while the other end passes around the guide pulley as the operating end. The operating end has a pull ring and extends to a safe position away from the kiln. The operator pulls the steel wire rope 410 to rotate the support frame 402 around the high-strength bolt 4043, causing the refractory brick 408 to detach from or insert into the process hole 1021, thus opening and closing the process hole 1021. During the process of refractory brick 408 being turned outward from process hole 1021, refractory brick 408 rotates around the axis of high-strength bolt 4043 and will not interfere with the inner wall of process hole 1021 or kiln side wall 104; when refractory brick 408 is turned inward into place, it just seals process hole 1021 and no leakage occurs.

[0044] The glass production process of this special glass furnace is as follows: The glass batch is fed into the melting and stirring zone of the glass melt pool 2 through the feeding port 1032. The oxygen-fired heating system and the electrode heating system work together to bring the furnace to the high temperature required for glass melting. The first row of bubbling devices in the melting and stirring zone continuously blows gas into the glass melt, thoroughly stirring it and accelerating the melting rate of the glass batch, while simultaneously achieving preliminary homogenization and removing most of the bubbles. The partially molten glass, under the action of the liquid flow, crosses the first furnace sill 206 and enters the deep homogenization and bubble removal zone. In this zone, the second row of bubbling devices continues to stir the glass melt, further homogenizing its composition and temperature, and removing any remaining tiny bubbles. The physical barrier formed by the two furnace sills 206 effectively prevents incompletely molten solid materials from entering the downstream functional areas, avoiding impurities from contaminating the finished glass melt. After homogenization and bubble removal, the molten glass crosses the second kiln sill 206 and enters the downstream functional area. In this area, there is no bubbling device, and the molten glass is in a stable, static state. Final clarification and temperature homogenization are completed in this area. Qualified finished molten glass is discharged through the outlet 205 at the bottom of the pool wall 204 and enters the subsequent forming process. During kiln operation, the roof thermocouple 1011 and the bottom thermocouple 202 collect temperature data in real time and transmit it to the automatic control system. This system automatically adjusts the power of the oxygen-fired combustion device and the electrode heating device to ensure stable internal kiln temperature. The exhaust system 3 regulates the exhaust volume through the first valve 302 and the second valve 304 to maintain stable internal kiln pressure. The exhaust gas is treated for environmental protection and then discharged in compliance with standards. When the kiln needs maintenance or malfunctions, the discharge port 203 of the corresponding functional area can be opened to independently discharge the molten glass from that area.

[0045] When it is necessary to open the process opening 1021, the operator, from a safe position away from the kiln, first rotates the clamping component 403 to disengage it from the slot 407, releasing the clamping constraint on the support frame 402. Then, the operator pulls the wire rope 410, causing the support frame 402 to rotate around the hinge axis of the hanging assembly 404, so that the refractory brick 408 is completely detached from the process opening 1021, and the corresponding process operation can be carried out. After the process operation is completed, the wire rope 410 is slowly released, and the support frame 402 moves the refractory brick 408 back to the process opening 1021. Then, the clamping component 403 is rotated and engaged in the slot 407, pressing the refractory brick 408 tightly into the process opening 1021, achieving a tight seal of the process opening 1021. This ensures the stability of the process inside the kiln, avoids the risk of metal materials being directly burned and introduced into the kiln through the process opening 1021, and improves work efficiency and operator safety.

[0046] In the above embodiments, two kiln sills 206 are arranged parallel to each other along the length of the glass melt pool 2. In other embodiments, the number of kiln sills 206 can be adjusted according to the scale of the kiln and process requirements. For example, only one kiln sill 206 is set, in which case the glass melt pool 2 is divided into an upstream functional area and a downstream functional area along its length. The upstream functional area is equipped with multiple sets of bubbling devices to complete the melting of the glass batch, the homogenization of the glass melt, and the defoaming. The downstream functional area completes the settling and clarification of the glass melt and the discharge, which is suitable for the production needs of small and medium-sized special glass kilns. Of course, in other embodiments, three kiln sills 206 can also be set, dividing the glass melt pool 2 into four functional areas, realizing the fine process division of melting, preliminary homogenization, deep defoaming, and settling and clarification, which is suitable for the production needs of special categories of high-quality special glass and the need to increase the scale of the kiln.

[0047] In the above embodiments, the bubbling devices are arranged in rows along the width of the glass melt pool 2 in both the melting and stirring zone and the deep homogenization and bubble removal zone, and the distance between any two rows of bubbling devices is equal. In other embodiments, the arrangement of the bubbling devices can also be flexibly adjusted according to the requirements of the glass melt flow field, such as using staggered arrangement, or gradually changing the spacing between rows according to the process zones.

[0048] In the above embodiments, the clamping member 403 is a square steel clamping component that is rotated and assembled, and the refractory brick 408 is clamped and fixed by being inserted into the slot 407. In other embodiments, the clamping member 403 may also adopt other structures that can be quickly locked, such as a bolt tightening structure, an eccentric wheel clamping structure, or a quick-clamp clamping structure.

[0049] In the above embodiments, the remote operating mechanism uses a flexible component indirect transmission to drive the support frame 402 to rotate. In other embodiments, the remote operating mechanism can also use a rigid linkage transmission method, such as using a multi-segment hinged extended operating linkage. One end of the linkage is hinged to the connection part 405 of the support frame 402, and the other end extends to a safe operating position away from the kiln. By pushing and pulling the linkage, the support frame 402 can be driven to rotate. There is no elastic deformation during the transmission process, and the action accuracy is higher. Of course, in other embodiments, a power-driven remote control operation method can also be used. For example, an electric push rod can be used to drive the support frame 402 to rotate. The control end of the electric push rod is located in the central control room or safe operating area. The extension and retraction of the push rod can realize the automatic opening and closing of the refractory bricks 408 by controlling the push rod with a button; or a pneumatic cylinder can be used to drive the operation through a remote air circuit control valve, without the need for manual force from the operator.

[0050] In the description of this specification, "multiple" means at least two, such as two, three or more, unless otherwise expressly specified.

[0051] While various embodiments of the invention have been shown and described in this specification, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention.

Claims

1. A special glass furnace, comprising a rectangular glass melt pool and a furnace body connected above the glass melt pool, wherein the furnace body is provided with a feeding port and the glass melt pool is provided with a discharge port; characterized in that, The bottom of the glass melt pool is provided with at least one kiln sill to divide the glass melt pool along its length into an upstream functional area near the feed port and a downstream functional area near the discharge port. The upstream functional area is provided with multiple sets of bubbling devices. The upstream functional area is used for melting the glass batch, homogenizing the glass melt and debubbling, while the downstream functional area is used for settling and clarifying the glass melt and discharging it.

2. The special glass furnace according to claim 1, characterized in that, The kiln sill is arranged in two parallel intervals along the length of the glass melt pool to divide the upstream functional area into a melting and stirring zone and a deep homogenization and defoaming zone. Both the melting and stirring zone and the deep homogenization and defoaming zone are equipped with the bubble-blowing device.

3. A special glass furnace according to claim 2, characterized in that, The lengths of the melting and stirring zone, the deep homogenization and defoaming zone, and the downstream functional zone increase sequentially along the length of the glass melt pool.

4. A special glass furnace according to claim 2, characterized in that, The bubbling device is arranged in at least two rows along the length of the glass melt pool, and at least one row of bubbling devices is arranged in both the melting and stirring zone and the deep homogenization and bubble removal zone. Each row of bubbling devices includes multiple bubblers arranged at equal intervals along the width of the glass melt pool.

5. A special glass furnace according to claim 2, characterized in that, The bottom of the glass melt pool is equipped with discharge ports corresponding to the melting and stirring zone, the deep homogenization and defoaming zone, and the downstream functional zone. Each discharge port is located on the center line of the bottom of the pool. The discharge ports located in the melting and stirring zone and the deep homogenization and defoaming zone can be interchanged with the corresponding bubbling devices.

6. A special glass furnace according to any one of claims 1-5, characterized in that, It also includes a heating system, which comprises several pairs of oxygen-fired devices and several pairs of electrode heating devices. The oxygen-fired devices are symmetrically arranged on the corresponding side walls on both sides of the furnace body, and the electrode heating devices are symmetrically arranged on the corresponding pool walls on both sides of the glass melt pool.

7. A special glass furnace according to any one of claims 1-5, characterized in that, The furnace body has corresponding process holes on its walls, and each process hole is equipped with a sealing structure. The sealing structure includes refractory bricks and a support frame assembled together. The refractory bricks are adapted to the size of the process holes. The support frame is connected to a remote operating mechanism. The remote operating mechanism is used to rotate the support frame around an axis perpendicular to the center line of the process hole so that the refractory bricks can be sealed and inserted into or removed from the process holes.

8. A special glass furnace according to claim 7, characterized in that, A base support is fixed on the outside of the furnace body, and the support frame is rotatably assembled with the base support through a hanging assembly; a clamping component is rotatably assembled on the base support through an axis parallel to the center line of the process hole, and a slot matching the clamping component is also fixed on the base support. When the clamping component rotates to the slot, it presses the refractory brick into the process hole.

9. A special glass furnace according to claim 8, characterized in that, The hanging assembly includes an upper connector and a lower connector. The upper connector is fixed to the base support, and the lower connector is fixed to the support frame. The upper connector and the lower connector are hinged together by high-strength bolts.

10. A special glass furnace according to claim 7, characterized in that, The support frame has a connecting part, and the remote operating mechanism includes a flexible operating component and a guide component that guides and cooperates with the flexible operating component; one end of the flexible operating component is fixed to the connecting part, and the other end is the operating end. When the flexible operating component is pulled, it drives the refractory brick to flip so as to open and close the process hole.

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