JPH0417538Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement of a side-blowing type glass melting tank kiln that melts glass raw materials and sends the clarified molten glass to a forming process. During the period from the back wall of the melting chamber of the type glass melting tank kiln to the final blowing section, the glass that is originally targeted for dripping down along the inner surfaces of the ceiling abutment, blowing outlet column, upper side wall, etc. of the glass melting tank kiln. This is a structure that prevents foreign contaminated impurity compositions from entering the molten glass, and is particularly useful for side-blowing type glass melting tank kilns for flat glass. It can also be widely used in raw material melting furnaces.

[Conventional technology]

Normally, a side-blowing type glass melting tank kiln has an inlet that continuously supplies glass raw materials, and reaches a maximum temperature due to heating by oil burner combustion from both sides.
It consists of a melting chamber that is maintained at around 1550℃ to melt glass raw materials, a fining chamber that refines the molten glass base, an adjustment chamber that further refines the clarified glass base, and a work room that molds the glass base. The height of the glass base surface inside the kiln is maintained at a substantially constant level by balancing the raw materials with the molten glass base material drawn from the kiln for molding. Generally, the melting chamber of a side-blowing glass melting tank kiln has a ceiling abutment made of silica brick, and side walls, jaw tiles, seed tiles, etc. made of electroformed blocks.

The capacity of side-blown glass melting tank kilns has increased year by year, and high melting capacity is required, so by melting as much glass raw material as possible at as high a temperature as possible and using a molten glass base that is highly homogeneous and refined, it is reamed into molded glass products. It is required that there be no defects such as sticks or destruction.

Under these circumstances, the melting chamber, especially between the back wall and the final blowout section, has a relatively high space above the glass base surface in order to effectively burn and heat, so a large side wall area is exposed. On the other hand, glass raw materials that are continuously supplied are exposed to harsh conditions such as high-temperature combustion flames, and so that the heat energy can be effectively applied to the continuously supplied glass raw materials. Efforts have also been made to move closer. At this time, due to the flow of the combustion flame, a very small part of the fine glass raw material particles or gas volatiles fly up into the upper space and adhere to the upper structure of the melting chamber, such as the ceiling abutments and upper side walls, causing a chemical reaction. It becomes a foreign glass-like substance that invades the structure, drips down the ceiling abutments, upper side walls, etc., drips into the molten glass base, contaminates the molten glass base, and reaches the work room. Even if the glass is heated, it remains without being homogenized and causes the defects mentioned above in the molded glass product.

Further, in the early stages of operation, when the electroformed block is exposed to severe conditions as the upper side wall as described above, the sweating phenomenon, that is, the glassy matrix in the block springs out, aggravating the phenomenon.

Various measures have been taken to prevent contaminants that are different from the intended molten glass base from entering the molten glass base in the glass melting furnace. For example, Japanese Utility Model Publication No. 49-16368 describes a glass melting tank, which has a lower side wall constituting a molten glass chamber and an upper side wall extending upward toward the ceiling, with a step immediately below the inner surface of the upper side wall. In a glass melting tank, the upper side wall is recessed outwardly with respect to the lower side wall, and the cooling device is provided on the top surface of the stepped portion so as to be in contact with the surface of the molten glass. In addition, a device is disclosed in which a removable trapping device having a trapping surface is disposed directly under the upper side wall in order to trap falling impurities.

[Problem that the invention attempts to solve]

As mentioned above, the conventional method described in Japanese Utility Model Publication No. 16368/1983 sets a cooling box on the molten glass base surface at the top of a so-called seed tile, and has a removable filth trap placed behind or diagonally above the cooling box. Not only is the equipment itself complicated, but the surrounding structure must also be complicated, and maintenance work such as replacing and removing the water cooling box and dirt trapping device is also difficult. Therefore, it is difficult to apply it to, for example, a glass melting furnace with an underport type structure.

[Means for solving problems]

The present invention was developed in view of the above drawbacks of the conventional technology, and includes providing a groove-like recess in the upper surface of the chin tile that supports the upper side wall at the lowest part of the upper structure, and connecting the groove-like recess to the heat storage chamber. The simple structure allows the waste to flow naturally into the heat storage chamber through the outlet floor while maintaining its fluidity, thereby preventing it from getting mixed into the molten glass base in the melting chamber. To provide a side-blowing type glass melting tank kiln that can prevent the above.

That is, the present invention provides a side blow-out type glass melting tank kiln, between the back wall in the melting chamber and the final blow-out part, on the upper side wall in between and on the upper surface part of the jaw tile located directly under the inner surface of each blow-off outlet column. A groove-shaped recess is provided, and the entire or part of the floor surface of each blowout section is inclined downward from the melting chamber side toward the heat storage chamber side, so that the groove-shaped recess and the heat storage chamber are in communication with each other. The present invention provides a side-blowing type glass melting tank kiln characterized by the following.

Here, the reason for the distance from the back wall in the melting chamber of the side blowing type glass melting tank kiln to the final blowing part is that even in the side blowing type glass melting tank kiln, the maximum temperature is around 1550℃, which is high. This is because particles tend to scatter or volatile substances are generated before the glass raw material is melted, and the presence of combustion gas tends to cause dirt to come into contact with the refractory, and the back wall on the inner wall of the glass raw material inlet This refers to the range from the end to the final blowout section.

Further, for example, in the blowout section, the groove-like recess is provided along the blowout port column, and the entire floor surface or a part of the floor surface of the blowout section, which is a communication path with the heat storage chamber, is moved from the melting chamber side to the heat storage chamber side. Impurities such as filth flowing downward are allowed to flow into the heat storage chamber very naturally at all times and are removed, and it is preferable that the angle of inclination is 3° or less.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of the blow-off parts 1 on both sides of a side blow-out type glass melting tank kiln.
The molten glass base surface (the second
The metal line 13) shown in the figure is kept constant. There is a chin tile 4 on top of the seed tile 3, and an upper side wall 5 is constructed extending directly slightly backward from the chin tile 4, and an air outlet pillar 6 is installed flush with the upper side wall 5.
A burner tile 8 is provided on the chin tile of the outlet part that supplies heated air for combustion, and for example, oil is sprayed by an oil burner (not shown) to form a combustion flame. The upper side wall 5
Above is a ceiling abutment 9 that covers the entire melting chamber, and each of these structures is supported externally by metal fittings (not shown). In addition, the number of blowing sections 1 is not necessarily constant depending on the side blowing type glass melting tank kiln, but in a plate glass kiln, there are approximately 4 to 8.
It is common to have about 1,000 pieces each on both sides. Furthermore, although not shown, the blowing section 1
There are heat storage chambers on both sides outside the melting chamber, which are connected to the blow-off section 1 through a communication path, and there is a floor surface 10 of the blow-off section.

Groove-shaped recess 11 of the present invention and the groove-shaped recess 1
1 to the heat storage chamber is arranged on the upper surface of the chin tile 4 located directly under the inner surface of a part of the upper side wall 5 and the outlet pillar 6 between each outlet part 1 , and It captures the dripping of glass-like molten material, which is a foreign waste generated from sweating on the side walls, carryover of gas raw materials, condensation of volatile vapor, etc., and stores the captured material in a heat storage chamber very naturally. By allowing the molten glass to flow into the melting chamber, it is possible to prevent the molten glass from flowing into the molten glass base in the melting chamber.

FIG. 2 is a partial cross-sectional view taken along the line A-A′ shown in FIG. is made clearer.

FIG. 3 is a partial sectional view taken along the line B-B′ shown in FIG.
In order to constantly and naturally flow foreign waste and glass-like molten material that has accumulated from the back end of the The floor surface 10 is inclined. Incidentally, the slope of the blow-off section floor surface 10 may be either a partial slope or a full slope, but it is essential that the slope is connected to the groove-shaped recess 11. In addition, the inclination angle of the outlet floor 10 is set to 3 degrees or less because if it exceeds 3 degrees, the heated air blown out during combustion will flow upward, which will prevent the combustion flame from flowing smoothly and deteriorate the melting performance. This is because it tends to have an adverse effect such as increasing the carry over of fine glass raw materials.

[Effect of idea]

As described above, according to the present invention, a groove-like recess is arranged in the upper surface of the jaw tile along the inner surface of the upper side wall between the back wall and the final blowing part of the melting chamber of the side blowing type glass melting tank kiln. established,
By skillfully connecting the groove-shaped recess and the heat storage chamber, foreign contaminated glass-like molten material that drips down from the upper side wall, etc., does not mix into the molten glass base in the kiln, and has a self-cleaning effect. , the occurrence of defects such as rims and reams in molded glass products is extremely reduced, and the construction of the kiln is not complicated, and there is no need to install a water-cooled box, reducing thermal efficiency or pouring out waste glass due to difficult heating. You can achieve your purpose without it.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the blowing section of the melting chamber of a side-blowing type glass melting tank kiln, and Fig. 2 is a perspective view of the blow-off section of the melting chamber of a side-blowing type glass melting tank kiln.
FIG. 3 is a partial sectional view of section A', and FIG. 3 is a partial sectional view of section BB' shown in FIG. 1 ... Outlet part, 4... Chin tile, 5... Upper side wall, 6... Outlet pillar, 10... Outlet part floor surface, 11
...Groove-like recess.

Claims (1)

[Scope of utility model registration request] Between the back wall in the melting chamber of a side-blowing type glass melting tank kiln and the final blow-off section, a groove-like recess is provided in the upper side wall between the back wall and the top surface of the jaw tile located directly below the inner surface of each blow-out port column. , and the entire surface or a part of the floor surface of each of the blow-off parts is inclined downward from the melting chamber side toward the heat storage chamber side, and the groove-shaped recesses and the heat storage chamber are connected. Side-blown glass melting tank kiln.