JPH0342019Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a glass melting furnace that is capable of heating the throat part through which molten glass heated and melted in a melting tank flows down in high-level waste glass melting equipment. be.

[Conventional technology]

In conventional high-level waste liquid glass melting equipment, the second
As shown in the figure, a melting tank 2 is installed inside the glass melting furnace 1.
A feeder tank 3 is provided in parallel with the melting tank 2.
A plurality of main electrodes 4 are installed in the melting tank 2 so as to face each other, and the glass is heated and melted by direct electricity supply between the main electrodes 4. Contact with throat part 5,
The molten glass 6 melted in the melting tank 2 is configured to overflow through the throat portion 5 and flow down from the feeder tank 3. 7 is a power supply device for the main electrode 4, and 8 is a raw material supply nozzle provided on the ceiling of the melting tank 2.

Melting of the raw glass supplied to the melting tank 2 in the conventional glass melting furnace 1 is carried out by heating the raw glass by direct energization between the main electrodes 4.
Molten glass 6 is fed to feeder tank 3 once a day.
It flows down through the

However, in the above conventional method, the throat portion 5
Since the amount of glass held in the molten glass 6 is small, the heat capacity of the glass is small, and the length of the throat portion 5 is also increased to a certain extent.
As the molten glass 6 flows down, the temperature of the molten glass 6 decreases in the middle of the throat portion 5, and there is a risk that the viscosity increases and solidification occurs.

What is important when operating a glass melting furnace is to prevent the temperature of the glass from decreasing at the throat portion that connects the melting tank 2 and the feeder tank 3.

For this purpose, recently, as shown in FIG. 3, an auxiliary electrode 9 is inserted into the throat part 5 and electricity is applied between the main electrode 4 and the auxiliary electrode 9 of the melting tank 2 to heat the glass in the throat part 5. There are some ideas that have been made to do this.

[Problem that the invention attempts to solve]

However, even with the configuration shown in FIG. 3, when starting up the glass melting furnace or restarting it after stopping with the glass held inside, the temperature of the throat part 5 is low, so the auxiliary electrode 9 and the main electrode It is impossible to conduct electricity between the two.

Accordingly, the present invention attempts to heat the throat portion by making it possible to conduct electricity between the auxiliary electrode and the main electrode when starting or restarting the glass melting furnace.

[Means for solving problems]

In the present invention, bricks with good conductivity are used as the bricks constituting the throat section connecting the melting tank and the feeder tank of the glass melting furnace, and a circuit is constructed with the auxiliary electrode, the conductive bricks, and the main electrode.

[Effect]

When starting or restarting a glass melting furnace, electricity is applied between the auxiliary electrode, the brick in the throat section, and the main electrode, thereby heating the throat section.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, in a configuration similar to that shown in FIG.
0 is embedded in a cylindrical shape, and the throat portion 5 is configured with the conductive brick 10, so that current can be passed between the auxiliary electrode 9 and the main electrode 4 via the conductive brick 10.

When the throat portion 5 is heated to melt the glass within the throat portion 5 when the glass melting furnace 1 is started or restarted, electricity is applied between the auxiliary electrode 9 and the main electrode 4. The conductive bricks 10 constituting the throat section 5 generate resistance heat by themselves when electricity is passed through them as part of a circuit, and the throat section 5 is heated by this heat, and the glass inside the throat section 5 is gradually melted. .

Once the glass in the throat portion 5 is melted, the original energization begins. That is, the auxiliary electrode 9 - the molten glass in the throat part 5 - the main electrode 4 are energized,
A drop in temperature of the molten glass at the throat portion 5 is prevented.

[Effect of idea]

As described above, according to the glass melting furnace of the present invention, even if the temperature of the throat section is too low to conduct electricity between the auxiliary electrode and the main electrode when starting or restarting the furnace, it is possible to easily conduct electricity between the throat and the main electrode. The glass inside the throat can be melted by heating the
This has the excellent effect of enabling smooth operation.

[Brief explanation of drawings]

Figure 1 is a sectional view of the glass melting furnace of the present invention, Figure 2 is a cross-sectional view of the glass melting furnace of the present invention;
The figure is a cross-sectional view of a conventional glass melting furnace, and FIG. 3 is a cross-sectional view of a glass melting furnace that has been recently considered. 1 is a glass melting furnace, 2 is a melting furnace, 3 is a feeder tank, 4 is a main electrode, 5 is a throat portion, 6 is a molten glass, 9 is an auxiliary electrode, and 10 is a conductive brick.

Claims (1)

[Scope of utility model registration request] It has a throat part that connects the melting tank and the feeder tank, and has an auxiliary electrode in the throat part and a main electrode in the melting tank, and forms a circuit that connects the auxiliary electrode and the main electrode to the throat part. A glass melting furnace characterized by being made of conductive bricks.