阅读说明：本技术 一种用于电子显示玻璃生产的分层加热熔窑 (Layered heating melting furnace for electronic display glass production ) 是由 张冲 左泽芳 方强 曹志强 张治民 于 2020-05-25 设计创作，主要内容包括：本发明提供一种用于电子显示玻璃生产的分层加热熔窑,它包括熔窑(1),在熔窑(1)内沿玻璃液流动方向分为加料部(1a)、熔化部(1b)以及澄清部(1c),在熔化部(1b)池壁上对称设有一组加热电极(2),其特征在于：在加热电极(2)上方的熔化部(1b)池壁上还对称设有燃烧器(4)。本发明结构简单、使用方便、避开了电极加热距离的约束,在不增加电极的作用距离情况下,可大幅提高熔窑的熔化能力。(The invention provides a layered heating melting furnace for producing electronic display glass, which comprises a melting furnace (1), wherein the melting furnace (1) is internally divided into a feeding part (1 a), a melting part (1 b) and a clarifying part (1 c) along the flowing direction of molten glass, and a group of heating electrodes (2) are symmetrically arranged on the wall of the melting part (1 b), and the layered heating melting furnace is characterized in that: burners (4) are also symmetrically arranged on the wall of the melting part (1 b) above the heating electrode (2). The invention has simple structure and convenient use, avoids the restriction of the heating distance of the electrode, and can greatly improve the melting capacity of the melting furnace under the condition of not increasing the action distance of the electrode.)

1. The utility model provides a layering heating melting furnace for electronic display glass production, it includes melting furnace (1), divide into charging portion (1 a), melting portion (1 b) and clarification portion (1 c) along the glass liquid flow direction in melting furnace (1), and the symmetry is equipped with a set of heating electrode (2) on melting portion (1 b) pool wall, its characterized in that: the melting part (1 b) is of a T-shaped structure, the lower part of the melting part is a narrow heating part (a), the upper part of the melting part is a wide heating part (b), a group of heating electrodes (2) are arranged on the pool wall of the narrow heating part (a), and a group of burners (4) are arranged on the pool wall of the wide heating part (b).

2. A layered heating furnace for electronic display glass production as claimed in claim 1, wherein: the installation position of the burner (4) is higher than the liquid level of the molten glass (13).

3. A layered heating furnace for electronic display glass production as claimed in claim 1, wherein: a smoke outlet (3) is also arranged above the burner (4).

The technical field is as follows:

the invention relates to the technical field of glass production, in particular to a layered heating melting furnace for electronic display glass production.

Background art:

in the field of manufacturing of electronic display glass (TFT-L CD glass), a melting furnace consists of a feeding part, a melting part, a clarifying part and other parts, the vertical cross section comprises a tank bottom, a tank wall, a breast wall and an arch top, a smoke exhaust port is arranged on the breast wall, the tank bottom and the tank wall need to be air-cooled, the tank bottom and the tank wall are used for containing molten glass, an upper space is formed between the liquid level of the molten glass and the arch top of the feeding part, a combustion space is formed between the liquid level of the molten glass and the arch top of the melting part, and the melting furnace is integrally supported and fixed in a suspended mode.

In order to meet the technological requirements, the melting temperature of the glass liquid reaches 1680 ℃, the raw materials are heated to a molten conductive state by an oxygen-enriched burner, then the raw materials are continuously heated to the temperature required by the technology by a heating electrode, the oxygen-enriched burner is arranged on the upper part of the tank wall and is higher than the liquid level of the glass liquid, and the heating electrode is arranged on two sides of the lower part of the tank wall and is lower than the liquid level of the glass liquid. There is an urgent market need to improve the melting capacity of melting furnaces to produce wider breadth electronic display glass.

At present, considering the safety factor, when the voltage of the heating electrode is used to the limit, the melting capacity of the melting furnace cannot be improved by increasing the voltage, that is, the melting capacity of the melting furnace cannot be improved by increasing the width of the furnace body, and only increasing the length of the furnace body can cause the heating efficiency to be greatly reduced. The method comprises the following steps of arranging a heating electrode on the bottom of a tank to shorten the distance between the heating electrodes after increasing the width of a melting furnace body, wherein the heating electrode is completely immersed in molten glass, so that the heating electrode cannot be replaced, and the path of heating current is not beneficial to heating. Increasing the width of the melting section of the melting furnace has become a development bottleneck in the electronic display glass industry.

The invention content is as follows:

the invention provides a layered heating melting furnace for producing electronic display glass, aiming at overcoming the defects in the prior art.

The application provides the following technical scheme:

the utility model provides a layering heating melting furnace for electronic display glass production, it includes the melting furnace, is divided into charging portion, melting portion and clarification portion along the glass liquid flow direction in the melting furnace, and the symmetry is equipped with a set of heating electrode on melting portion pool wall, its characterized in that: the section of the melting part is of a T-shaped structure, the lower part of the melting part is a narrow heating part, the upper part of the melting part is a wide heating part, a group of heating electrodes are symmetrically arranged on the pool wall of the narrow heating part at the lower part, and a group of burners are arranged on the pool wall of the wide heating part at the upper part, so that the layered heating of the molten glass is realized.

On the basis of the technical scheme, the following further technical scheme can be provided:

the installation position of the burner is higher than the liquid level of the glass liquid.

And smoke outlets which are distributed correspondingly to the burners are also arranged on the breast wall opposite to the burners.

The invention has the advantages that:

the invention has simple structure and convenient use, can effectively avoid the limitation of the heating distance of the electrode, and greatly improves the melting capacity of the melting furnace under the condition of not increasing the action range of the electrode.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

The specific implementation mode is as follows:

as shown in FIGS. 1 and 2, a layered heating melting furnace for electronic display glass production comprises a melting furnace 1, and the melting furnace 1 is divided into a charging part 1a, a melting part 1b and a refining part 1c which are communicated in sequence along the flowing direction of molten glass 13.

The cross section of the melting part 1b is of a T-shaped structure, the melting part comprises a narrow heating part a with a smaller width at the lower part, and a group of heating electrodes 2 which are correspondingly distributed are arranged on the pool walls at two sides of the narrow heating part a. A wide heating part b having a width twice that of the conventional melting furnace is provided at the top end of the narrow heating part a.

The crown 12 of the melting furnace is bridged on the top ends of the breast walls 11 at both sides of the wide heating part b. A group of symmetrically distributed burners 4 are arranged on the tank wall at both sides of the wide heating part b. The group of burners 4 is divided into two rows which are symmetrically distributed on the tank walls at two sides of the melting furnace. On the opposite breast wall 11 of each row of burners 4, a set of smoke outlets 3 is also provided, distributed in correspondence with the row of burners 4.

The installation position of the burner 4 is higher than the liquid level of the molten glass 13, the burner 4 is an oxygen-enriched gas gun, and the flame 4a sprayed by the burner is horizontally distributed.

The wavy line in the figure is a schematic line of the current between the two heating electrodes 2.

The working principle is as follows:

the melting part 1b is divided into an upper layer and a lower layer by the melting part 1b with a T-shaped section, and the glass melt 13 is heated respectively. The heating electrode 2 is arranged on the narrow heating part a with smaller width at the lower part, so that the problem of limitation of the heating distance of the electrode can be effectively avoided, and a lower melting layer of molten glass is formed; melting the upper layer of molten glass by using a burner 4 on a wide heating part b having a large width at the upper part to form an upper molten layer of molten glass; the melting capacity of the melting section 1b is surely improved by the combined heating manner of the narrow heating section a and the wide heating section b. The technical effect of greatly improving the melting capacity of the melting furnace is realized under the condition of not increasing the action distance of the electrode.