A structure of upper gap bricks to prevent the iron support plate of the breast wall of a glass melting furnace from burning.

Abstract

This invention relates to the technical field of upper gap brick structures in glass melting furnaces, specifically an upper gap brick structure to prevent the damage of the breast wall support plate iron in glass melting furnaces from burning. Addressing the problems in existing technologies such as large gaps (>30mm) between the gap bricks and hook bricks in the cold state, inability to accurately predict the expansion dimensions of the bricks, large gaps remaining even after high-temperature expansion, easy detachment after burning due to the use of only L-shaped bricks for fire blocking, threatening the safety of the breast wall support plate iron, and the inability to replace the gap bricks, this invention proposes an improved solution by adding wedge-shaped bricks to the L-shaped bricks: the wedge-shaped bricks are pre-installed with the L-shaped bricks in the cold state, with a gap of at least 15mm between the wedge-shaped bricks and hook bricks during installation to allow for expansion space. In the hot state, they are pushed into the furnace until the gap closes to form a seal; the wedge-shaped bricks fit snugly with the main body of the L-shaped bricks, so even if the head of the L-shaped brick falls off, the wedge-shaped bricks can still block the transfer of furnace heat to the breast wall support plate iron, while simultaneously pressing down on the main body of the L-shaped bricks to prevent them from falling off. This invention reduces the risk of breast wall collapse caused by refractory burn-off during the later stages of furnace operation, while preserving operational space for replacing gap bricks.

Description

Technical Field

[0001] This invention relates to the technical field of gap brick structure on the wall of a glass melting furnace, specifically to an upper gap brick structure that prevents the iron support plate of the breast wall of a glass melting furnace from burning. Background Technology

[0002] The glass melting furnace is the core equipment in glass production, and its breast wall support plate bears the crucial mechanical function of supporting the breast wall structure, which is essential to the overall stability of the furnace. The gap brick structure on the pool wall, as the only brick material in front of the breast wall support plate that isolates the furnace fire, must withstand the erosion of molten glass at temperatures exceeding 1500℃ and the scouring of the furnace flames over long periods. In existing technology, in the cold state, because the expansion dimensions of the bricks cannot be accurately predicted, there is usually a gap of more than 30mm between the gap bricks and the hook bricks above the pool wall, with only a single L-shaped brick shielding against the erosion of the molten glass and the furnace fire (e.g., ...). Figure 1 (As shown). Gaps of 30mm or more are expansion joints used to prevent the hook bricks from breaking due to expansion under high temperature. However, in reality, these expansion joints cannot be completely closed under hot conditions, and there are still large gaps.

[0003] However, in the later stages of furnace operation, the hook bricks and gap bricks in the high-temperature zone suffer severe burn damage due to long-term erosion by molten glass. Especially in areas where refractory material erosion is more severe, such as the front melting zone of the furnace, the heads of the burnt "7"-shaped bricks are prone to falling off. Even after the gap bricks expand at high temperatures, a large gap remains between them and the hook bricks, allowing the furnace fire to directly erode the breast wall support plate. If the breast wall support plate is burned through, the breast wall will lose its support, leading to a wall collapse and irreparable production losses. Furthermore, the existing structure has limited operating space between the gap bricks and hook bricks, making it impossible to effectively replace the gap bricks. Especially after the pool wall is reinforced, there is no operating space left to replace the gap bricks during furnace operation. This creates a significant safety hazard: the burnt gap bricks will damage the breast wall support plate, causing the breast wall to lose support and collapse. Utility Model Content

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an upper gap brick structure to prevent the steel support plate of the glass melting furnace from burning, thereby solving the problems of existing gap bricks (7-shaped bricks) easily falling off after burning, threatening the safety of the steel support plate, and the inability to replace the gap bricks.

[0005] Technical solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: A gap brick structure for preventing the burning of the breast wall support plate iron of a glass melting furnace includes hook bricks, gap bricks and wedge bricks; the gap bricks and hook bricks are provided with a gap of more than 30 mm in width; the gap bricks are 7-shaped bricks; the vertical section of the 7-shaped bricks is attached to the side wall of the hook bricks, and the horizontal section extends to the breast wall support plate iron; the top surface of the wedge bricks is provided with an inclined first mating surface (311), and the bottom surface is provided with a second mating surface (321) that matches the top surface of the gap bricks (2); the inclination angle between the first mating surface (311) and the second mating surface (321) can be adjusted to 5°-90° according to the actual working conditions. The wedge-shaped brick is positioned above the horizontal section of the 7-shaped brick, with its bottom surface fitting against the top surface of the 7-shaped brick; the wedge-shaped brick is positioned above the bottom surface of the hook brick, with its top surface fitting against the bottom surface of the hook brick; the wedge-shaped brick is pre-assembled with the 7-shaped brick in a cold state, ensuring a gap of at least 15mm between the wedge-shaped brick and the hook brick during installation to allow for expansion space. In a hot state, the expanded wedge-shaped brick is pushed into the kiln until the gap closes to form a seal (e.g., ...). Figure 2 (As shown). Beneficial effects

[0007] The beneficial effects of this invention are as follows: 1. Double fire protection: Through the fitting structure of the 7-shaped brick and the wedge-shaped brick, even if the head of the 7-shaped brick falls off due to burnt damage, the wedge-shaped brick can still block the furnace fire from transferring heat to the breast wall support plate iron, thus preventing the support plate iron from burning through.

[0008] 2. To prevent bricks from falling off: The wedge-shaped bricks press down on the main body of the 7-shaped bricks, increasing their stability and reducing the risk of the 7-shaped bricks falling off as a whole.

[0009] 3. Preserving maintenance space: This type of pushable wedge brick provides operating space for subsequent replacement of gap bricks, improving the flexibility of furnace maintenance. Attached Figure Description

[0010] Figure 1 A schematic diagram of a conventional design for the gap brick structure on the pool wall; Figure 2 This is an overall schematic diagram of the upper gap brick structure of this utility model; Figure 3 A cross-sectional structural diagram of the wedge-shaped brick added to this utility model; Figure 4 This is a schematic diagram showing the completed installation state of this utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to specific embodiments: In this embodiment, the furnace sidewall structure includes hook bricks (1), gap bricks (2), and wedge bricks (3). The gap (4) between the gap bricks (2) and the hook bricks (1) is 30mm wide (which can be adjusted according to actual working conditions).

[0012] The gap brick is a 7-shaped brick made of 33# fused zirconia corundum brick. Its vertical section (height 150mm) is attached to the side wall of the hook brick (2), and its horizontal section (length 235mm) extends into the chest support plate iron. The wedge-shaped brick (3) also uses 33# fused zirconia-corundum brick, with a first mating surface (311) at an inclination of 10° on the top surface of the horizontal section. The bottom surface is machined with a second mating surface (321) at 15° to match the top surface (211) of the 7-shaped brick; the thickness of the wedge-shaped brick decreases from 54mm to 30mm along the pushing direction (towards the kiln) (e.g. Figure 3 (As shown).

[0013] During installation, first place the wedge brick (3) above the horizontal section of the 7-shaped brick (3) in a cold state (unheated furnace). Note that the gap between the wedge brick and the hook brick should be at least 15mm to allow for expansion space. After the furnace is heated to a hot state (above 1200℃), use a special tool to push the wedge brick (3) into the furnace until the wedge brick (3) is in close contact with the lower side wall of the hook brick (1), thus completing the seal (e.g., ...). Figure 4 (As shown).

Claims

1. A structure of upper gap bricks for preventing the iron support plate of the breast wall of a glass melting furnace from burning, characterized in that: It includes a hook brick (1), a gap brick (2) and a wedge brick (3); there is a gap (4) with a width > 30mm between the gap brick (2) and the hook brick (1); the gap brick (2) is a 7-shaped brick; the vertical section of the gap brick (2) is attached to the side wall of the hook brick (1), and the horizontal section extends into the wedge brick (3); the wedge brick (3) is set above the horizontal section of the gap brick (2), and the bottom surface of the wedge brick (3) fits with the top surface of the gap brick (2); the wedge brick (3) is pre-assembled with the gap brick (2) in a cold state, and the wedge brick is pushed into the kiln in a hot state until the gap (4) is closed to form a seal.

2. The upper gap brick structure according to claim 1, characterized in that: The top surface of the wedge-shaped brick (3) is provided with an inclined first mating surface (311), and the bottom surface of the wedge-shaped brick (3) is provided with a second mating surface (321) that matches the top surface of the gap brick (2). The inclination angle between the first mating surface (311) and the second mating surface (321) is 5°-90°.

3. The upper gap brick structure according to claim 1, characterized in that: The thickness of the wedge brick (3) gradually decreases along the advancing direction, and after hot advancing, the wedge brick (3) is in close contact with the lower side wall of the hook brick (1).

4. The upper gap brick structure according to claim 1, characterized in that: Both the gap brick (2) and the wedge brick (3) are made of 33# fused zirconia corundum material with a refractoriness of ≥1750℃.

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