JPS6240294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a furnace wall of a glass melting furnace.

Glass melting furnaces heat glass raw materials to 1,500°C or higher to melt and vitrify them, so the furnace walls are constructed of refractory bricks that have a high degree of fire resistance and are resistant to corrosion by high-temperature glass. However, even with today's highest quality refractory bricks, it is not possible to prevent the parts that come into contact with molten glass from being eroded under high-temperature conditions. Therefore, in order to suppress this erosion, a method of cooling the furnace wall in this area from the outside is often used.

Two methods are usually used for this cooling, either singly or in combination:
One of them is an air cooling system, in which pressurized air from a blower or air compressor is guided into an air pipe and a discharge pipe connected to it, and the furnace wall (firebrick) is cooled from the discharge port of the discharge pipe. Cooling is achieved by spraying directly onto the necessary areas. The other type is water cooling, in which a water-cooled pipe is brought into contact with a desired part that requires cooling. The former type of air cooling is mainly used in glass melting furnaces as a wide range cooling method, while water cooling is often used for spot cooling.

By the way, the conventional air cooling device 4, as shown in FIG. The opening shape of the discharge port 3 is circular, rectangular, etc. depending on the shape of the part that requires cooling, but the air blown from the discharge port 3 is simply Since the air is normally blown onto the furnace wall 5 through the opening area of the discharge port 3, the blown air immediately diffuses into the atmosphere after contacting the furnace wall, making it impossible to use the discharged air. It would be difficult to say that it was being carried out effectively.

Therefore, the present inventor has developed the present invention with the aim of effectively cooling the furnace wall by effectively utilizing this discharged air.

That is, in the present invention, in order to effectively utilize the cooling effect of the air flow of the discharged air, firstly, a flat plate part that spreads out with a constant gap from the furnace wall is formed to direct the air flow along the furnace wall surface as much as possible. The cooling water is configured to promote convection and diffusion and improve heat dissipation by passing the cooling water through the guide flat plate portion that guides the flow of the air. , which improves the air cooling effect.

Next, the present invention will be explained in detail according to embodiments shown in the drawings.

Embodiment 1 In FIGS. 2 and 3, an air cooling device 10 equipped with a discharge pipe 7 and a blast pipe 12 is arranged parallel to the furnace wall 11 to be cooled with a constant gap from the discharge port 9 at its tip. It is configured to have a flat plate 8 for guiding airflow that spreads out.

According to the air cooling device 10 having such a configuration,
The cooling air passes through the discharge pipe 7 and is discharged from the discharge port 9, first air-cooling the furnace wall 11 in front of the discharge port 9, and then flows along the furnace wall 11 through the flat plate 8, and flows through the furnace wall 11 opposite the flat plate 8. Air-cool the parts over a large area.

According to the air cooling device having the configuration of this embodiment, the distance between the flat plate 8 and the furnace wall 11 is 5 to 10 mm, and the blowing pressure is 50 to 10 mm.
When setting the amount of cooling air to 100 mmaq, it was possible to obtain the same cooling effect with 50% of the amount of cooling air used in conventional equipment.

Embodiment 2 In FIG. 4, a cooling device 13 has a cooling device 13 in which the flat plate 8 in Embodiment 1 is made into a hollow body with a built-in water pipe to allow water to pass therethrough. That is, the cooling device 13 is
A discharge pipe 14 connected to the blow pipe, and the discharge pipe 14
A water cooling device 17 is provided in the form of a flat plate at a constant distance from the discharge port 15 of the furnace wall 16.By passing cooling water through the water cooling device 17, in addition to the effects of the first embodiment, The water cooling device 17 cools the air for air cooling, thereby providing the advantage that the air cooling effect is further enhanced.

Further, according to this example, there is an advantage that the following effects can also be obtained.

That is, when an accident occurs at the end of the life of a glass melting furnace in which the inner surface of the furnace wall is perforated by glass erosion, and as a result molten glass flows out from the furnace wall, the outflowing glass is cooled and solidified by the water cooling device 17. This has the effect of preventing further leakage.

Embodiment 3 This embodiment shows an example in which an air cooling device is installed at a corner of a furnace wall. In FIGS. Water cooling device 2 with an L-shaped flat plate
0 and the discharge port 2 toward the corner of the furnace wall 19.
1 and a box body 24 which constitutes a blower pipe 23 with the water cooling device 20 as a part thereof. 25 is a ventilation pipe, and 26 is a cooling water supply/discharge pipe.

According to this embodiment, not only the corner portions of the furnace wall that particularly require cooling are air-cooled with high efficiency as in the first embodiment, but also the air-cooled gas is directly
By flowing along the space between and the water cooling device,
It has the effect of sufficiently cooling the furnace wall, and also has the effect of minimizing the accident by cooling and solidifying the spilled glass in the event of an accident of spilling molten glass from the furnace wall, as in Example 2. It is something that can be done.

As described above, the cooling device according to the present invention has higher cooling efficiency than conventional devices and can achieve a great effect on energy saving, and can also advantageously prevent erosion of the furnace wall by molten glass, and can also achieve the same effect. This device has many advantages such as lower equipment cost than conventional devices that raise the temperature, and its usefulness is extremely great.

[Brief explanation of the drawing]

FIG. 1 is an explanatory sectional view of a conventional device, FIG. 2 is an explanatory sectional view of an apparatus according to an embodiment of the present invention, and FIG. 3 is an explanatory perspective view of the embodiment shown in FIG. FIG. 4 is a cross-sectional explanatory diagram of an apparatus according to another embodiment of the present invention;
FIG. 5 is an explanatory diagram of still another embodiment of the present invention, and FIG.
This figure is an explanatory cross-sectional view of the embodiment shown in FIG. 5. 1...Blow pipe, 2...Discharge pipe, 3...Discharge port,
4... Air cooling device, 5... Furnace wall, 6... Molten glass, 7... Discharge pipe, 8... Flat plate, 9... Discharge port,
10...Air cooling device, 11...Furnace wall, 12...Blow pipe, 13...Cooling device, 14...Discharge pipe, 15...
...Discharge port, 16...Furnace wall, 17...Water cooling device, 1
8...Cooling device, 19...Furnace wall, 20...Water cooling device, 21...Discharge port, 22...Discharge pipe, 23...
Blower pipe, 24... Box body, 25... Blower piping, 26
...Supply/discharge pipe.

Claims (1)

[Scope of Claims] 1. In a furnace wall cooling device for a glass melting furnace in which cooling air is blown directly onto the furnace wall from the discharge port of a discharge pipe, the discharge pipe has an outwardly curved shape from the flat edge of the discharge port. 1. A furnace wall cooling device for a glass melting furnace, characterized in that a flat plate part for guiding air flow is provided that extends along the furnace wall and maintains a constant gap from the opposite furnace wall. 2. A furnace wall cooling device for a glass melting furnace as set forth in claim 1, wherein the flat plate portion is a water cooling device incorporating a cooling water pipe.