A photovoltaic rolled glass melting furnace pool wall brick joint gap cooling device

Abstract

The utility model relates to a kind of photovoltaic calendered glass melting furnace pool wall brick joint gap cooling device, including fan, the main air pipe being connected in the fan output end, the branch air pipe being connected on the main air pipe, the air nozzle for being installed on the branch air pipe and used for air outlet, further include steel grating, for being installed at corresponding brick joint gap position to cover brick joint gap with the outside wall of pool wall;The air nozzle corresponds steel grating position, for air-cooled steel grating.The utility model provides a kind of unique air cooling device for brick joint gap, using air-cooled mode in the vicinity of brick joint gap, steel grating is tightly attached to the outside of pool wall, by the air nozzle and steel grating of air outlet, air volume is evenly distributed, to realize the good effect of pool wall brick joint gap safety cooling.

Description

Technical Field

[0001] This utility model relates to a technology for cooling and mitigating erosion of the joints in the wall bricks of a photovoltaic rolled glass melting furnace, specifically a cooling device for the joints in the wall bricks of a photovoltaic rolled glass melting furnace. Background Technology

[0002] Photovoltaic rolled ultra-clear glass has excellent light transmittance, with a transmittance of over 91.5%. Due to differences in raw materials and melting processes, the melting furnace for ultra-clear glass has the following characteristics.

[0003] The iron content in photovoltaic rolled glass formulations is lower than that in float glass, generally below 120 ppm. This results in higher thermal permeability of the molten glass, leading to a smaller temperature gradient along the depth direction in the melting furnace. To ensure the smooth removal of microbubbles, the refining section temperature in photovoltaic furnaces is generally higher than that of float glass. Ultra-clear rolled glass has lower viscosity, stronger fluidity and penetrability, and therefore causes more severe erosion of the furnace walls.

[0004] After a glass melting furnace stops production, in addition to the traces left by the molten glass flow on the wall bricks of the melting section, severe erosion is often observed in the joints between the bricks. This is because a complex electrochemical reaction occurs within the joints of the fused zirconia-corundum bricks. At joints below 1120℃, the molten glass reacts with the fused zirconia-corundum bricks to generate numerous bubbles. These bubbles allow the molten glass to penetrate the refractory material, thus exacerbating its erosion. The bubbles are generated by the electrochemical reaction within the fused zirconia-corundum bricks. This electrochemical reaction is primarily caused by several factors: the alkaline substances present in the glass, the electrical conductivity of the refractory material due to the zircon structure, and the presence of oxygen in the joints.

[0005] Ultra-clear glass molten glass has a higher temperature and lower viscosity, making it easier for bubbles to precipitate. This leads to more severe erosion of the brick joints in the ultra-clear glass melting furnace walls, making these joints more permeable and posing a constant risk of molten glass leakage. Leaks often occur at the corresponding locations on the furnace pillars. This is because the narrow space in the furnace wall at the pillars hinders heat dissipation, causing excessively high temperatures in the brick joints and resulting in intense electrochemical reactions. Furthermore, several photovoltaic ultra-clear glass production lines in China have experienced molten glass leakage at the casting inlet of the furnace walls, leading to shutdowns for cold repairs. Therefore, the casting inlet area is also prone to electrochemical reactions and subsequent erosion.

[0006] Currently, the melting zone walls of photovoltaic ultra-clear glass melting furnaces typically use 36# fused zirconia-corundum bricks. The liquid level in the furnace wall bricks is cooled by cooling air supplied by a wall fan. The main drawbacks of the current wall cooling system are: 1) In the later stages of furnace operation, complex electrochemical reactions occur within the gaps in the wall bricks, leading to faster erosion in these gaps compared to other areas, and a high risk of serious accidents such as glass leakage; 2) There is no effective cooling method for the wall gaps; the current photovoltaic ultra-clear glass melting furnace wall cooling system only cools the area near the liquid level; 3) In the later stages of furnace operation, insufficient airflow results in inadequate cooling intensity. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a cooling device for the gaps in the brick walls of a photovoltaic rolled glass melting furnace, namely a unique air cooling device for the gaps in the bricks. It uses air cooling near the gaps in the bricks, with a steel grid tightly attached to the outer edge of the furnace wall. The airflow is evenly distributed by connecting the air nozzles to the steel grid, thereby achieving a good effect of safe cooling of the gaps in the furnace wall bricks.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cooling device for the gaps in the wall bricks of a photovoltaic rolled glass melting furnace, comprising a fan, a main air duct connected to the output end of the fan, a branch air duct connected to the main air duct, and a nozzle installed on the branch air duct for air outlet, and further comprising:

[0009] A steel grating is installed at the corresponding brick gap position to fit the outer wall of the pool and cover the brick gap; the air nozzle is located at the corresponding position of the steel grating and is used to air-cool the steel grating.

[0010] Preferably, the branch duct is equipped with a control valve for adjusting the air volume.

[0011] Preferably, the branch duct is at the same height as the steel grating and is used to cool the gaps in the bricks at the top of the pool wall.

[0012] Compared with existing technologies, this invention offers the following advantages: It employs a cooling scheme combining air cooling and steel grating for the brick joints. Air cooling slows down the erosion rate, providing particularly effective cooling in the later stages of the kiln process. Furthermore, it slows down the electrochemical reaction process, preventing leakage and improving the kiln's safety factor. Simultaneously, air cooling of the steel grating increases the cooling range and ensures more uniform and effective airflow distribution. The branch ducts can be customized according to the location of erosion in the brick joints of the melting furnace wall, offering great flexibility and effectively reducing the risk of leakage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the cooperation between the cooling device of this utility model and the pool wall;

[0014] Figure 2This is a side view of the cooling device of this utility model at the gap in the pool wall bricks.

[0015] The numbers in the diagram are: 1-pool wall, 2-brick gap, 3-insulating brick, 4-steel grating, 5-fan, 6-main air duct, 7-branch air duct, 8-manual control valve. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Reference Figure 1 and Figure 2 It is known that a cooling device for the gaps in the wall bricks of a photovoltaic rolled glass melting furnace includes a variable frequency fan 5, a main air duct 6 connected to the output end of the fan 5, branch air ducts 7 connected to the main air duct 6, and air nozzles installed on the branch air ducts 7 for air outlet. A manual control valve 8 for adjusting the air volume is installed on the branch air ducts 7. The variable frequency fan 5 provides the required air volume according to the actual situation. Air is delivered to each branch air duct 7 through the main air duct 6, and the specific opening degree is adjusted by the manual control valve 8 at the end of the branch air duct 7 to adjust the air volume.

[0018] It also includes a steel grating 4, which is located between the insulation bricks 3 on the outer side of the two pool walls 1, closely fitting the outer side of the pool wall 1 and covering the gaps 2 between the bricks.

[0019] The variable frequency fan 5 is located below the melting furnace. The main air duct 6 is divided into two parts and introduced into the channels on both sides of the small furnace. The branch air duct 7 is positioned corresponding to the brick joint 2, and the air nozzle is positioned corresponding to the steel grating 4. The air volume is evenly distributed to the surface of the pool wall 1 through the steel grating 4. The steel grating 4 is cooled by air cooling, which increases the cooling range and makes the air volume distribution more uniform and effective. Moreover, the height of the branch air duct 7 is the same as the height of the steel grating 4, which can cool the brick joint 2 at the upper end of the pool wall 1.

[0020] The gaps in the furnace wall are the interface between gas, liquid, and solid phases. Under the action of molten glass flow, the erosion rate of the electrofused zirconia-corundum bricks is faster than in other parts, and glass leakage often occurs here. Air cooling can slow down the erosion rate, especially in the later stages of the furnace process, thus improving the furnace safety factor and slowing down the electrochemical reaction process to prevent leakage. The branch duct 7 can be customized according to the erosion location of the gaps 2 in the furnace wall 1, offering great flexibility and effectively reducing the risk of leakage.

Claims

1. A cooling device for the gaps in the wall bricks of a photovoltaic rolled glass melting furnace, comprising a fan (5), a main air duct (6) connected to the output end of the fan (5), a branch air duct (7) connected to the main air duct (6), and a nozzle installed on the branch air duct (7) for air outlet, characterized in that, It also includes: A steel grating (4) is installed at the corresponding brick gap (2) position to fit the outer wall of the pool wall (1) and cover the brick gap (2); The air nozzle corresponds to the position of the steel grating (4) and is used for air cooling of the steel grating (4).

2. The photovoltaic rolled glass melting furnace wall brick gap cooling device according to claim 1, characterized in that: The branch duct (7) is equipped with a control valve for adjusting the air volume.

3. The photovoltaic rolled glass melting furnace wall brick gap cooling device according to claim 1, characterized in that: The branch duct (7) is at the same height as the steel grating (4) and is used to cool the brick gaps (2) at the top of the pool wall (1).

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