JPH0441144Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an improvement of the throat upper structure of a glass melting furnace.

(Prior Art) Generally, a melting tank and a clarification tank in a glass melting furnace are connected through a throat, and this throat sends out high-quality glass below the middle part of the melting tank to the clarification tank. Lower the temperature of the glass to eliminate bubbles. It works by promoting homogenization of glass.

However, since the glass flows in a narrow channel in this throat, the flow velocity is the highest in the furnace, the temperature is higher than in other parts of the same level, and the joints of the refractory are Due to the fact that they are immersed in glass and the convection caused by the temperature difference between the melting tank and the clarification tank, the members facing the melting tank (hereinafter referred to as facers) and ceiling members (hereinafter referred to as covers) are susceptible to corrosion. is remarkable. Therefore,
The lifespan of a glass melting furnace is largely determined by the degree of damage to the throat. As erosion of the throat progresses, the function of the throat decreases and glass begins to leak from the joint surface between the facer and the cover. In this case, it was necessary to shut down the glass melting furnace and carry out minor processing or to install bricks.

Specifically, you can reduce the level of the molten glass substrate to the point where the substrate is leaking, then cut out the holes in that area and apply the bricks to the size of the bricks, or if you don't have time, you can remove the molten glass from the substrate. Make a wedge brick based on the size of the leak,
The method used was to scrape off the leaking material with a shovel, apply a wedge brick at the same time, cool it with water to harden it, and then strengthen the cooling process.

(Problem that the invention aims to solve) When a glass melting furnace is shut down for minor repairs, the glass in the furnace is usually drained out and the furnace temperature is lowered to room temperature before work is carried out. For this reason, there is a problem in that production is stopped for a long time due to minor repairs, resulting in very large production losses.

In addition, with the method of applying bricks, the leakage of the base material is stopped, but the function of the throat remains deteriorated. Therefore, a method of processing without stopping the glass melting furnace has been desired. However, in reality, it is difficult to work from the outside because the gap between the wall of the melting tank and the wall of the clarification tank is narrow, and it is structurally difficult to remove the cover block from the top. There was a risk that the product would fall into the throat.

The present invention was made in consideration of the above problems, and aims to provide a throat structure for a glass melting furnace that allows the throat to be replaced and its function restored without shutting down the glass melting furnace. .

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above object, the present invention divides the throat ceiling member into a plurality of parts, places each member on the throat side wall across the throat, and
This glass melting furnace has a throat structure in which a taper is provided on the contact surface between the members, and the length of the member is longer than both outer surfaces of the throat side wall that supports the member.

(Function) In the throat constructed in this manner, the ceiling member is divided into a plurality of pieces, and the weight of each piece is reduced, thereby ensuring workability and safety.

Further, by providing a taper in the divided members, the contact surface of the bricks can be easily separated when removing damaged members, and when setting new parts, positioning is easy and quick work can be performed.

Further, the portion where the length of the member protrudes from the outer surface of the throat side wall is a position where a special tool for suspending the member to be replaced is set, and workability and safety are greatly improved.

(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 8.

Figures 6 and 7 show the conventional general throat structure, in which a facer 3 facing the melting tank, a facer 4 facing the clarification tank, and an undivided There is a cover 5. If this throat is eroded and seeds leak, a brick 6 is applied as shown in FIG. 8, but the function of the throat remains degraded.

Figures 1 and 2 show an embodiment of the throat structure of the present invention, in which facers 7 and 8 and covers 9 and 1 are divided into two parts with tapered contact surfaces.
0 and sleevers 11 and 12 that support them. A dissolving tank wall 13 and a clarifying tank wall 14 are constructed above the facers 7, 8. The width of the covers 9 and 10 is the same as that of the walls 13 and 1.
4, and its length is longer than both outer surfaces of the sleeves 11 and 12. If this throat is eroded as shown in Fig. 3 and seeds leak from the contact surface between facer 7 and cover 9, etc.,
As shown in Figure 4, lower the glass level below the top of the sleeve, then use the special tool to remove cover 1.
After lifting and removing the cover 9 and removing the cover 9 at the joint, preheated cover bricks 15, 16, and 17 are set using a special tool as shown in FIG. Once the setup is complete, level up and start production.

[Effect of idea]

As described above, since the present invention has a taper on the contact surface of the throat cover, the surface can be easily separated during replacement or repair. Also, since the length of the cover protrudes longer than the outer surface of the sleeve, it is easy to set a special tool when lifting. Additionally, since the ceiling components were divided, the weight of each component was reduced, and the safety of lifting operations during replacement and repair was ensured.

Furthermore, when setting a new cover, it is less likely to break due to contact between bricks, making it easier to set. In addition, the cover can be replaced as many times as needed, and each time the cover is replaced, the function and life of the throat can be restored to the same level as when it was newly installed. Additionally, since repairs can be made without shutting down the glass melting furnace, the repair period is shortened by approximately 10 days compared to conventional methods, significantly reducing production losses.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a throat showing an embodiment of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a cross-sectional view of a throat with advanced erosion, and Fig. 4 is a view for repairing a throat with advanced erosion. FIG. 5 is a cross-sectional view showing a special lifting tool set on the cover, and FIG. 5 is a cross-sectional view of essential parts showing an example of a throat that has been repaired. FIG. 6 is a perspective view of a conventional common throat, FIG. 7 is a sectional view thereof, and FIG. 8 is a sectional view of a throat repaired with a patch brick. 3, 4, 7, 8... Facer, 5, 9, 1
0, 15, 16, 17...Cover, 1, 2, 1
1, 12...Sleever, 13...Dissolution tank wall, 1
4... Clarifying tank wall.

Claims (1)

[Scope of utility model registration request] The ceiling member of the throat that connects the melting tank and the clarification tank of the glass melting furnace is divided into multiple parts, and each member is placed on the throat side wall across the throat, and the contact surface between the parts is tapered. A throat structure for a glass melting furnace, wherein the length of the member is longer than both outer surfaces of the throat side wall.