JP2005188778A - Glass melting furnace and heat-proof repairing method for glass melting furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass melting furnace and a heat-proof repairing method of the glass melting furnace capable of efficiently improving the durability of a dissolver in the glass melting furnace, improving the durability by after-installation even on the glass melting furnace during use, and elongating the service life of the dissolver deteriorated with age. <P>SOLUTION: A cooler 10 having a circulating passage 11 of the cooling water used as a heat medium, is mounted inside of a metallic band plate-shaped cooling plate 12. The cooler 10 is mounted in a state of surrounding the dissolver P at a height of a liquid surface of the molten liquid glass G to partially cool the dissolver P. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a glass melting furnace capable of enhancing the durability of a melting tank in a glass melting furnace and extending the life of a melting tank that is currently in use and has been deteriorated over time, and a heat-resistant repair method for the glass melting furnace It is about.

  Various glass melting furnaces are used as glass melting furnaces depending on the shape, size, heat source, and the like. Among them, a melting furnace of a type that melts glass with a heat source of a burner provided at the upper part of a melting tank is known. This type of melting furnace also has a variety of different types of burners such as gas burners, heavy oil burners, oxyfuel burners, different heat sources, burner installation positions, and the direction of flame emitted from the burners. A glass melting furnace is used.

  Patent Document 1 is a glass melting furnace using a gas burner as a heat source. This melting furnace is configured to improve the temperature distribution in the furnace of the gas combustion type glass melting furnace.

Patent Document 2 is a glass melting furnace having an oxyfuel combustion burner, and is configured for the purpose of removing harmful components in combustion waste gas.
Japanese Patent Laid-Open No. 9-14502 JP 2001-302251 A

  In a conventional glass melting furnace in which a burner is disposed on the upper part of the melting tank, it is known that the vicinity of the melted glass liquid surface inside the melting tank is the highest temperature. This is because the direct heat of the burner or the radiant heat inside the tank is concentrated on the surface of the melted liquid glass.

  In general, the durability of the melting tank is determined by the thickness of the refractory bricks constituting the melting tank. That is, the refractory bricks of the melting tank are continuously used while maintaining a predetermined thickness, and the life is exhausted when it is determined that the thickness is reduced and cannot be used.

  However, the glass melting tank is not uniformly deteriorated, but a part of the glass melting tank is extremely deteriorated. That is, as described above, the temperature of the liquid surface portion of the melted liquid glass becomes the highest even in the inside of the melting tank, so that the refractory brick in contact with the liquid surface becomes severely damaged, and this portion of the refractory brick is in other parts. This is a phenomenon in which the thickness of the refractory bricks in the melting tank becomes extremely thin as a result of prior deterioration and erosion.

  As shown in the cited documents 1 and 2, even if the type of burner is different, in the glass melting furnace of the type in which the burner is installed at the upper part of the melting tank, the refractory brick of the liquid glass liquid surface part is extremely The phenomenon of deterioration and erosion does not change.

  Therefore, the present invention was created to solve the above-mentioned problems, and it is possible to increase the durability of the melting tank in the glass melting furnace extremely efficiently, and it is durable even in the glass melting furnace in use. The purpose of the present invention is to provide a glass melting furnace and a heat-resistant repair method for the glass melting furnace that can improve the performance and prolong the life of the melting tank that is aged over time.

  In order to solve the above-mentioned problem, the first means of the present invention includes a circulation path 11 for circulating a heat medium in a glass melting furnace in which a burner Q is disposed on a melting tank P made of refractory bricks. The cooler 10 is provided, and the cooler 10 is mounted so as to surround the melt tank P at a height located at the liquid surface of the melted liquid glass G, and the melt tank P is locally cooled. is there.

  The cooler 10 of the second means is that a cooling water circulation path 11 used as a heat medium is provided in a cooling plate 12 having a metal strip shape.

  The cooler 10 of the third means is configured by winding a metal tube 13 having a round or square cross section around the outer surface of the dissolution tank P.

  The fourth means is a heat-resistant repair method for a glass melting furnace in which a burner Q is disposed on a melting tank P made of refractory bricks, and includes a cooler 10 provided with a circulation path 11 for circulating a heat medium, A heat-resistant repair method for a glass melting furnace in which the cooler 10 is mounted so as to surround the outer surface of the melting tank P at a height positioned at the liquid level of the melted liquid glass G, and the melting tank P is locally cooled. It is in.

  According to the glass melting furnace of the present invention, the durability performance of the entire melting tank P can be remarkably enhanced only by locally cooling the vicinity of the liquid surface of the liquid glass G in the melting tank P.

  By providing the cooling water circulation path 11 inside the cooling plate 12 in the form of a metal strip as the cooler 10, extremely efficient heat exchange can be performed.

  Moreover, the simple cooler 10 can be provided by configuring the cooler 10 by winding the metal tube 13 having a round or square cross section around the outer surface of the dissolution tank P.

  Furthermore, the lifetime of the melting tank P can be extended by using the heat-resistant repair method of the present invention for a glass melting furnace currently in use. For example, it is possible to extend the expected life by two to three times by strengthening the melting tank P that is near the end of its life with the heat-resistant repair method of the present invention.

  In the glass melting furnace according to the present invention, in the glass melting furnace in which the burner Q is disposed on the melting tank P composed of refractory bricks, the outer surface of the melting tank positioned on the liquid surface of the melted liquid glass G is surrounded. The initial purpose is achieved by mounting the cooler 10 including the circulation path 11 for circulating the cooling water and locally cooling the outer surface of the dissolution tank P.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is a glass melting furnace for all types of melting furnaces provided with a burner Q as a heat source on the upper part of a melting tank P formed of refractory bricks (see FIG. 1). In the present invention, the glass melting furnace refers to the entire structure of the furnace, and the melting tank P refers to all glass melting tanks in which the burner Q is installed so as to heat the liquefied glass upper portion in the melting tank P. Therefore, in the glass melting furnace of the present invention, the size of the equipment, the selection of the heat source, etc. can be arbitrarily set. Moreover, the heat-resistant repair method of the present invention is a heat-resistant repair method for all of these glass melting furnaces.

  The glass melting tank P of the present invention is made of refractory bricks, and a burner Q is disposed on the melting tank P. The burner Q is provided with a gas burner, a heavy oil burner, an oxyfuel burner, and the like. Moreover, the installation position of a burner can be set arbitrarily, for example, the upper side of the dissolution tank P or the side surface of the dissolution tank P is installed on the side. Furthermore, the direction of the flame radiated from the burner is also arranged so as to be directly applied to the surface of the glass melt, or a lid (not shown) is provided on the upper part of the melting tank P, and the flame is directed from this lid. It is possible to set arbitrarily, such as setting to use radiant heat.

  The cooler 10 is mounted so as to surround the dissolution tank P (see FIG. 1). The mounting position of the cooler 10 is set to a height located near the liquid level of the melted liquid glass G. That is, it is cooled in a strip shape along the vicinity of the liquid surface of the liquid glass G that is most deteriorated.

  The cooler 10 includes a circulation path 11 for circulating the heat medium. The heat medium is intended to be cooling water, but other heat mediums can be used. The cooler 10 shown in FIGS. 1 to 3 has a cooling water circulation path 11 in a cooling plate 12 formed of a metal strip such as an aluminum material (see FIG. 2). The cooling plate 12 is formed by laminating two plates, and a circulation path 11 is formed by combining a flat adhesive plate 12A with a pipe plate 12B obtained by pressing irregularities to be the circulation path 11. (See FIG. 3). Then, the adhesive plate 12A is brought into contact with the outer surface of the dissolution tank P and fixed with fixing screws or other fixing means.

  The cooler 10 shown in FIG. 4 is configured by winding a metal tube 13 having a round cross section around the outer surface of the dissolution tank P. Further, the cooler 10 shown in FIG. 5 is configured by winding a metal tube 13 having a square cross section around the outer surface of the dissolution tank P. In this way, the configuration of the cooler 10 can be simplified. It is also possible to mount these tubular coolers 10 in the refractory bricks of the melting tank P.

  The heat-resistant repair method of the present invention is a method for repairing the dissolution tank P that has already been used. The melting tank P to be repaired is a melting tank P in which a burner Q is disposed on the melting tank P made of refractory bricks. In the first step of the repair work, the most deteriorated and eroded portion is specified on the inner wall surface of the melting tank. This portion is an inner periphery along the height located on the liquid surface of the melted liquid glass G. Next, as a second step, the cooler 10 including the circulation path 11 for circulating the heat medium is mounted on the outer surface of the dissolution tank P at the specified position so as to surround the dissolution tank P. The last step is to cool the dissolution tank P locally by circulating a heat medium through the cooler 10.

  It should be noted that the present invention is not limited to the above-described embodiments, and material replacement, design change, and the like can be freely performed without departing from the scope of the present invention.

It is a schematic sectional drawing which shows one Example of this invention. It is a front view which shows one Example of this invention cooler. It is a plane sectional view showing one example of the cooler of the present invention. It is principal part sectional drawing which shows the other Example of this invention cooler. It is principal part sectional drawing which shows the other Example of this invention cooler.

Explanation of symbols

G Liquid glass P Dissolution tank Q Burner 10 Cooler 11 Circulation path 12 Cooling plate 13 Metal tube

Claims (4)

  In a glass melting furnace in which a burner is disposed on a melting tank composed of refractory bricks, a cooler having a circulation path for circulating a heat medium is provided, and the cooler is positioned on the liquid surface of the melted liquid glass. A glass melting furnace which is mounted so as to surround the melting tank at a height to be cooled, and the melting tank is locally cooled.   The glass melting furnace according to claim 1, wherein the cooler is provided with a circulation path of cooling water used as a heat medium inside a cooling plate having a metal strip shape.   The glass cooler according to claim 1, wherein the cooler is configured by winding a metal tube having a round or square cross section around the outer surface of the melting tank. In a heat-resistant repair method for a glass melting furnace in which a burner is disposed on a melting tank composed of refractory bricks, a cooler having a circulation path for circulating a heat medium is provided, and the cooler is made of molten liquid glass. A method for heat-resistant repair of a glass melting furnace, wherein the melting tank is locally cooled at a height positioned on the liquid surface so as to surround the outer surface of the melting tank.

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