Novel observation apparatus and brick structure for neutral borosilicate glass melting furnace

Abstract

A novel observation apparatus (3) and a brick structure (2) for a neutral borosilicate glass melting furnace (1). The brick structure (2) is used for mounting in an observation port (14) provided on a side wall of the melting furnace (1), the brick structure (2) comprising an inner observation brick (21) and an outer observation brick (22), the outer observation brick (22) and the inner observation brick (21) being provided with an observation hole (24) which expands from outside to inside, the outer observation brick (22) being made of sintered zirconium mullite brick or sintered zircon brick, and the inner observation brick (21) being made of fused zirconium corundum brick or fused corundum brick. The observation apparatus (3) is disposed at the smallest opening of the observation hole (24), and the observation apparatus (3) comprises an observation tube (31) and an observation cover (32), one open end of the observation tube (31) being in communication with the observation hole (24), and a top part of the observation cover (32) being hinged to a top part of the other open end of the observation tube (31). The brick structure (2) reduces heat dissipation loss, and the observation apparatus (3) is embedded and has a compact structure, making regular fire observation operations more convenient.

Description

A new type of observation device and brick structure for medium borosilicate glass melting furnace Technical Field

[0001] The present invention relates to the technical field of glass processing, and in particular to a novel observation device and brick structure for a medium-borosilicate glass melting furnace. Background Art

[0002] Neutral borosilicate glass melting furnaces currently primarily utilize a full oxygen combustion system with electrically assisted heating. The melting temperature typically reaches around 1650°C. During the melting process, boron release can easily cause stratification and phase separation, affecting the clarity and homogenization of the molten glass. Therefore, the kiln's sealing requirements are higher than those of float glass furnaces. Medium borosilicate glass melting furnaces typically feature multiple observation holes on both breast walls to facilitate operator monitoring of production conditions.

[0003] At present, observation holes are generally made of a whole piece of fused zirconium corundum brick, and an observation device is attached to the outside of the observation hole brick. Some problems will arise in production applications. Due to the high thermal conductivity of the fused zirconium corundum brick at high temperature, the outer end face of the observation hole brick is red and dissipates a large amount of heat, which is not conducive to energy saving. The external observation device is very bulky, inconvenient to operate at high temperature, and easy to burn out. When the observation device is in operation, the wire rope will have electric sparks, indicating that part of the current of the electric auxiliary heating at the bottom of the pool flows through the observation hole brick to the wire rope, which will affect the efficiency of the electric melting and accelerate the erosion of the observation hole brick.

[0004] Summary of the Invention

[0005] In view of the above problems existing in the existing observation holes, the present invention aims to provide a new type of observation device and brick structure for medium-borosilicate glass melting furnace with compact structure, reduced heat loss and increased service life.

[0006] The specific technical solutions are as follows:

[0007] A novel observation device and brick structure for a medium borosilicate glass melting furnace. The brick structure is used to be installed in an observation port provided on the side wall of the melting furnace. The brick structure includes: an inner observation brick and an outer observation brick. The outer observation brick and the inner observation brick are provided with observation holes that are expanded from the outside to the inside. The outer observation brick is made of sintered zirconium mullite brick or sintered zircon brick, and the inner observation brick is made of fused zirconium corundum brick or fused corundum brick. The observation device is provided at the minimum opening of the observation hole and is used to open or close the observation hole. The observation device includes:

[0008] an observation tube, wherein an open end of the observation tube is in communication with the observation hole;

[0009] An observation cover, the top of which is hinged to the top of the other open end of the observation tube, and the outer side of the bottom of the observation cover is used for connecting a steel wire rope.

[0010] As a further improvement and optimization of this solution, a rectangular mounting groove is coaxially provided at the minimum opening of the observation hole, and the cross-section of an open end of the observation tube is a rectangular structure and is matched and embedded in the rectangular mounting groove.

[0011] As a further improvement and optimization of this solution, the observation tube is sealed and fixed to the inner wall of the rectangular installation groove by sealing fire clay or microcrystalline fiber blanket.

[0012] As a further improvement and optimization of this solution, the depth of the rectangular installation groove is 100-150 mm.

[0013] As a further improvement and optimization of this solution, the observation port is a rectangular port, the outer observation brick and the inner observation brick are both rectangular structures, the inner observation brick is matched and installed in the observation port, and the outer observation brick is fixed in the observation port by padding bricks on all sides.

[0014] As a further improvement and optimization of this solution, the observation cover is hinged to the observation tube via a pin.

[0015] As a further improvement and optimization of this solution, the melting furnace includes a large arch, a breast wall and a pool wall installed in sequence from top to bottom, and the observation port is provided on the breast wall.

[0016] As a further improvement and optimization of this solution, a plurality of observation ports are provided on both sides of the breast wall, and each of the observation ports is provided with the brick structure and the observation device.

[0017] Compared with the prior art, the above technical solution has the following positive effects:

[0018] (1) The brick structure of the present invention is composed of independent outer observation bricks and inner observation bricks, and the outer observation bricks are made of sintered zircon mullite bricks or sintered zircon bricks, and the inner observation bricks are made of fused zircon corundum bricks or fused corundum bricks. Compared with fused zircon corundum bricks, the high-temperature thermal conductivity of sintered zircon mullite bricks or sintered zircon bricks is about half lower. The heat in the kiln is transferred to the outside through the brick structure, which is beneficial to reducing the heat consumption of the melting furnace 1. At the same time, the outer surface temperature of the outer observation hole bricks will also be reduced, thereby increasing the service life of the device.

[0019] (2) Compared with the fused zirconium corundum bricks, the sintered bricks used in the outer observation hole bricks in the present invention have a resistivity more than 100 times higher at the same high temperature. This makes it difficult for the current of the electric auxiliary heating at the bottom of the pool to flow to the steel wire rope through the brick structure, effectively avoiding the electric spark phenomenon of the steel wire rope.

[0020] (3) The observation device in the present invention adopts an embedded installation method. Compared with the structure before the transformation, it is more compact and easier to operate when observing the production situation in the kiln. At the same time, the heat radiated outward through the observation hole will be greatly reduced, reducing the impact of fire observation on the stability of the thermal system in the glass melting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a novel observation device and brick structure for a medium borosilicate glass melting furnace according to the present invention;

[0022] FIG2 is a top view of a novel observation device and brick structure for a medium borosilicate glass melting furnace according to the present invention;

[0023] FIG3 is a schematic structural diagram of a novel observation device for a medium borosilicate glass melting furnace and an observation device for a brick structure according to the present invention;

[0024] In the attached figure: 1. melting furnace; 2. brick structure; 3. observation device; 4. steel wire rope; 11. large arch; 12. breast wall; 13. pool wall; 14. observation port; 21. inner observation brick; 22. outer observation brick; 23. pad brick; 24. observation hole; 25. rectangular mounting groove; 31. observation tube; 32. observation cover; 33. pin shaft. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0026] FIG1 is a schematic structural diagram of a novel observation device and brick structure for a medium borosilicate glass melting furnace according to the present invention, FIG2 is a top view of a novel observation device and brick structure for a medium borosilicate glass melting furnace according to the present invention, and FIG3 is a schematic structural diagram of a novel observation device and brick structure for a medium borosilicate glass melting furnace according to the present invention. As shown in FIG1 to FIG3, a novel observation device 3 and brick structure 2 for a medium borosilicate glass melting furnace 1 according to a preferred embodiment are shown. The brick structure 2 is used to be installed in an observation port 14 provided on the side wall of the melting furnace 1. The brick structure 2 includes: an inner observation brick 21 and an outer observation brick 22. An observation hole 24 is provided on the outer observation brick 22 and the inner observation brick 21, which is expanded from the outside to the inside. The outer observation brick 22 is made of sintered zirconium mullite brick or sintered zircon brick, and the inner observation brick 21 is made of fused zirconium corundum brick or fused corundum brick. The observation device 3 is provided at the minimum opening of the observation hole 24, which is used to open or close the observation hole 24. The observation device 3 includes an observation tube 31 and an observation cover 32. One open end of the observation tube 31 is connected to the observation hole 24, and the top of the observation cover 32 is hinged to the top of the other open end of the observation tube 31. The outer side of the bottom of the observation cover 32 is used to connect the wire rope 4.

[0027] In this embodiment, the brick structure 2 is composed of independent outer observation bricks and inner observation bricks 21, and the outer observation bricks 22 are made of sintered zircon mullite bricks or sintered zircon bricks, and the inner observation bricks 21 are made of fused zircon corundum bricks or fused corundum bricks. Compared with fused zircon corundum bricks, the high-temperature thermal conductivity of sintered zircon mullite bricks or sintered zircon bricks is about half lower. The heat in the kiln will be reduced from being transferred to the outside through the brick structure 2, which is beneficial to reducing the heat consumption of the melting furnace 1. At the same time, the outer surface temperature of the brick of the outer observation hole 24 will also be reduced, thereby increasing the service life of the device.

[0028] In this embodiment, compared with the fused zirconium corundum bricks, the sintered bricks used in the outer observation hole 24 have a resistivity more than 100 times higher at the same high temperature. In this way, it becomes difficult for the current of the electric auxiliary heating at the bottom of the pool to flow through the brick structure 2 to the steel wire rope 4, effectively avoiding the electric spark phenomenon of the steel wire rope 4.

[0029] Furthermore, as a preferred embodiment, in order to improve the installation stability of the observation device 3, a rectangular mounting groove 25 is coaxially provided at the minimum opening of the observation hole 24, and the cross-section of an open end of the observation tube 31 is a rectangular structure and is matched and embedded in the rectangular mounting groove 25 to prevent the observation tube 31 from rotating.

[0030] Furthermore, as a preferred embodiment, the observation tube 31 is sealed and fixed to the inner wall of the rectangular mounting groove 25 by sealing fire clay or microcrystalline fiber blanket.

[0031] In this embodiment, the observation device 3 adopts an embedded installation method. Compared with the structure before the modification, it is more compact and easier to operate when observing the production situation in the kiln. At the same time, the heat radiated outward through the observation hole 24 will be greatly reduced, reducing the impact of watching the fire on the stability of the thermal system in the glass melting furnace 1.

[0032] Furthermore, as a preferred embodiment, the depth of the rectangular mounting groove 25 is 100-150 mm.

[0033] Furthermore, as a preferred embodiment, the observation port 14 is a rectangular port, the outer observation brick 22 and the inner observation brick 21 are both rectangular structures, the inner observation brick 21 is matched and installed in the observation port 14, and the outer observation brick 22 is fixed in the observation port 14 by means of pad bricks 23 around it.

[0034] Furthermore, as a preferred embodiment, the observation cover 32 is hinged to the observation tube 31 via a pin 33 .

[0035] Furthermore, as a preferred embodiment, the melting furnace 1 includes a large arch 11 , a breast wall 12 and a pool wall 13 installed in sequence from top to bottom, and the observation port 14 is provided on the breast wall 12 .

[0036] Furthermore, as a preferred embodiment, a plurality of observation ports 14 are provided on both sides of the breast wall 12 , and each observation port 14 is provided with a brick structure 2 and an observation device 3 .

[0037] This embodiment solves the problems of large heat dissipation at the observation hole 24 and electric sparks on the wire rope 4 during operation of the observation device 3, thereby improving the efficiency of electric melting. The improved observation device 3 adopts an embedded method with a compact structure, which is more convenient for daily fire-watching operations. At the same time, the heat radiated outward through the observation hole 24 will also be greatly reduced, which is beneficial to energy saving and energy conservation of the glass melting furnace 1, saving fuel and electricity consumption costs.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel observation device and brick structure for a medium borosilicate glass melting furnace, wherein the brick structure is installed in an observation port provided on the side wall of the melting furnace, and is characterized in that: The brick structure comprises: an inner observation brick and an outer observation brick, wherein the outer observation brick and the inner observation brick are provided with observation holes expanded from the outside to the inside, the outer observation brick is made of sintered zirconium mullite brick or sintered zircon brick, and the inner observation brick is made of fused zirconium corundum brick or fused corundum brick, and the observation device is arranged at the minimum opening of the observation hole, and is used to open or close the observation hole, and the observation device comprises: an observation tube, an open end of which is in communication with the observation hole; An observation cover, the top of which is hinged to the top of the other open end of the observation tube, and the outer side of the bottom of the observation cover is used to connect a steel wire rope.

2. According to the novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 1, it is characterized in that: A rectangular installation groove is coaxially arranged at the minimum opening of the observation hole, and a cross section of an open end of the observation tube is a rectangular structure and is matched and embedded in the rectangular installation groove.

3. According to the novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 2, it is characterized in that: The observation tube is sealed and fixed to the inner wall of the rectangular installation groove by sealing fire clay or microcrystalline fiber blanket.

4. The novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 3 is characterized in that: The groove depth of the rectangular installation groove is 100-150mm.

5. The novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 1 is characterized in that: The observation port is a rectangular port, the outer observation brick and the inner observation brick are both rectangular structures, the inner observation brick is matched and installed in the observation port, and the outer observation brick is fixed in the observation port by pad bricks around it.

6. The novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 1 is characterized in that: The observation cover is hinged on the observation tube through a pin shaft.

7. The novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 1 is characterized in that: The melting furnace comprises a large arch, a breast wall and a pool wall which are installed in sequence from top to bottom, and the observation port is arranged on the breast wall.

8. The novel observation device and brick structure for medium borosilicate glass melting furnace according to claim 7 is characterized in that: A plurality of observation ports are provided on both sides of the breast wall, and each of the observation ports is provided with the brick structure and the observation device.

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