Total-oxygen float ultra-white glass melting furnace and furnace bottom stepped structure thereof

Abstract

The utility model discloses an all-oxygen float ultra-white glass melting furnace and a furnace bottom stepped structure thereof, the all-oxygen float ultra-white glass melting furnace comprises a furnace bottom, the glass melting furnace is sequentially provided with a bubbling area, a clarification area and a neck area along the flowing direction of molten glass, and the furnace bottom is gradually lifted from the bubbling area to the neck area; a lifting step is arranged at the bubbling area of the kiln bottom, and one to three lifting steps are arranged from the hot spot bubbling area to the clarification area. Therefore, by optimizing the stepped structure of the kiln bottom, the backflow phenomenon of the glass liquid from the hot spot area to the cooling part is effectively inhibited. By means of the design, unnecessary energy consumption is reduced, and the overall heat efficiency of the melting furnace is improved. On the premise that the melting area is not increased, the technology obviously improves the melting capacity of the melting furnace, so that more glass raw materials can be treated in unit time. Meanwhile, hot spots in the kiln are more prominent, and a clear zone is in a mirror-like clear state, which indicates that the glass melting quality is remarkably improved, and a solid foundation is laid for producing high-quality ultra-white glass.

Description

Technical Field

[0001] This utility model belongs to the field of glass melting furnace technology, and in particular relates to a full oxygen float ultra-white glass melting furnace and its stepped bottom structure. Background Technology

[0002] Ultra-clear glass, with its exceptional transparency and purity, is widely used in high-end architecture, art production, precision optical instruments, and many other fields. Its unique characteristic lies in the strict control of iron content in its composition to below 150 ppm, ensuring high light transmittance and low iron color effect. Currently, the mainstream melting processes for producing ultra-clear float glass fall into two main categories: one is a kiln-type production line using advanced oxy-fuel combustion technology, and the other is the traditional horizontal flame kiln-type production line that has been used for a long time.

[0003] Oxygen-fired technology, with its high efficiency and environmental friendliness, can theoretically significantly improve the melting efficiency of furnaces and reduce energy consumption. However, despite its many advantages, its adoption in practice is limited by factors such as high equipment investment, high technical barriers, and operational complexity. Therefore, in the domestic market, traditional horizontal flame furnaces remain the mainstream choice for producing high-end ultra-clear float glass, occupying a large market share.

[0004] However, both oxy-fuel combustion kilns and traditional cross-flame kilns face challenges such as limited melting capacity and high energy consumption in individual furnaces. Compared with international advanced levels, my country still lags behind in glass melting technology, resulting in the continued reliance on imports for some high-end ultra-clear glass products, which undoubtedly restricts the rapid development of related domestic industries. The kiln bottom structure, as a crucial component supporting the entire kiln pool and the quality of the molten glass, directly impacts the efficiency and quality of glass production. Traditional kiln bottom structures often fail to adequately consider the fluidity and convection of the molten glass, leading to uneven distribution of the molten glass at the kiln bottom, affecting the clarification and homogenization effects. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide an all-oxygen float ultra-white glass melting furnace and its stepped bottom structure, which effectively suppresses the backflow of molten glass from the hot spot to the cooling section.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A stepped structure for the bottom of a glass melting furnace using the oxygen-float process for ultra-white glass includes a bottom, wherein the glass melting furnace is divided into a bubbling area, a clarifying area, and a bottleneck area along the flow direction of the molten glass, and the bottom of the furnace gradually rises from the bubbling area to the bottleneck area.

[0008] The kiln bottom has a lifting step in the bubbling area, and there are 1 to 3 lifting steps from the bubbling area to the clarification area.

[0009] According to one embodiment of the present invention, the lifting step of the kiln bottom in the bubbling area is a first lifting step, and the lifting height value A of the first lifting step is 20~200mm.

[0010] According to one embodiment of the present invention, the kiln bottom is provided with three lifting steps from the bubbling area to the clarification area.

[0011] According to one embodiment of the present invention, the three lifting steps from the bubbling area to the clarifying area are sequentially a second lifting step, a third lifting step, and a fourth lifting step. The lifting height value B of the second lifting step is 20~200mm, the lifting height value C of the third lifting step is 20~200mm, and the lifting height value D of the fourth lifting step is 20~200mm.

[0012] According to one embodiment of the present invention, the kiln bottom is provided with a lifting step in front of the bottleneck area.

[0013] According to one embodiment of the present invention, the lifting step of the kiln bottom in front of the necking area is the fifth lifting step, and the lifting height value E of the fifth lifting step is 20~200mm.

[0014] Based on the same concept, this utility model also provides a full oxygen float ultra-white glass melting furnace, including the stepped furnace bottom structure for full oxygen float ultra-white glass melting furnace described in any one of the above.

[0015] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0016] Because of its high thermal conductivity during the production of ultra-clear glass, the temperature difference between the liquid surface and the bottom of the tank is reduced, leading to weakened convection in the depth direction and increased flow velocity in the horizontal direction. As the flow velocity of the molten glass increases in this section, the residence time in that section is shortened, thus reducing the time for bubble removal. Therefore, by optimizing the stepped structure of the furnace bottom, the backflow of molten glass from the hot spot area to the cooling section is effectively suppressed. This design not only reduces unnecessary energy consumption but also improves the overall thermal efficiency of the melting furnace, providing strong support for achieving green and energy-saving production. Without increasing the melting area, this technology significantly improves the melting capacity of the furnace, enabling it to process more glass raw materials per unit time. Simultaneously, the hot spots within the furnace are more prominent, and the clarifying zone exhibits a mirror-like clarity, signifying a significant improvement in glass melting quality and laying a solid foundation for the production of high-quality ultra-clear glass. In summary, this patented technology fully demonstrates the superiority of the all-oxygen float ultra-clear glass melting furnace in terms of thermal efficiency, energy consumption control, melting capacity, and product quality. It not only optimized the production process and reduced production costs, but also successfully promoted technological progress in the ultra-clear glass industry, providing the market with higher-quality and more efficient building material solutions. Attached Figure Description

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the present invention;

[0019] Figure 2 This is a partial schematic diagram of the present invention. Figure 1 ;

[0020] Figure 3 This is a partial schematic diagram of the present invention. Figure 2 .

[0021] Explanation of reference numerals in the attached diagram: 1. Bubbling area; 2. Clarifying area; 3. Neck area; 4. First lifting step; 5. Second lifting step; 6. Third lifting step; 7. Fourth lifting step; 8. Fifth lifting step. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Example 1

[0025] See Figures 1 to 3 The core of this utility model is to provide a stepped structure for the bottom of a glass melting furnace using the oxygen float method for ultra-white glass melting. The furnace bottom includes a bubbling area 1, a clarifying area 2, and a necking area 3 along the flow direction of the molten glass. The bottom of the furnace gradually rises from the bubbling area 1 to the necking area 3.

[0026] The kiln bottom has one lifting step in the bubbling zone 1, and one to three lifting steps from the bubbling zone 1 to the clarification zone 2. Specifically, the lifting step in the bubbling zone 1 is the first lifting step 4, and the lifting height A of the first lifting step 4 is 20~200mm.

[0027] The kiln bottom has three lifting steps between the bubbling zone 1 and the clarification zone 2. Specifically, the three lifting steps between the bubbling zone 1 and the clarification zone 2 are, in order, the second lifting step 5, the third lifting step 6, and the fourth lifting step 7. The lifting height value B of the second lifting step 5 is 20~200mm, the lifting height value C of the third lifting step 6 is 20~200mm, and the lifting height value D of the fourth lifting step 7 is 20~200mm.

[0028] A lifting step is provided at the bottom of the kiln before the bottleneck area 3. Specifically, the lifting step at the bottom of the kiln before the bottleneck area 3 is the fifth lifting step 8, and the lifting height E of the fifth lifting step 8 is 20~200mm.

[0029] Because of its high thermal conductivity during the production of ultra-clear glass, the temperature difference between the liquid surface and the bottom of the tank is reduced, leading to weakened convection in the depth direction and increased flow velocity in the horizontal direction. As the flow velocity of the molten glass increases in this section, the residence time in that section is shortened, thus reducing the time for bubble removal. Therefore, by optimizing the stepped structure of the furnace bottom, the backflow of molten glass from the hot spot area to the cooling section is effectively suppressed. This design not only reduces unnecessary energy consumption but also improves the overall thermal efficiency of the melting furnace, providing strong support for achieving green and energy-saving production. Without increasing the melting area, this technology significantly improves the melting capacity of the furnace, enabling it to process more glass raw materials per unit time. Simultaneously, the hot spots within the furnace are more prominent, and the clarifying zone exhibits a mirror-like clarity, signifying a significant improvement in glass melting quality and laying a solid foundation for the production of high-quality ultra-clear glass.

[0030] In summary, this patented technology fully demonstrates the superiority of the all-oxygen float glass melting furnace in terms of thermal efficiency, energy consumption control, melting capacity, and product quality. It not only optimizes the production process and reduces production costs but also successfully promotes technological advancement in the ultra-clear glass industry, providing the market with higher-quality and more efficient building material solutions.

[0031] Example 2

[0032] Another core aspect of this invention is providing a melting furnace for ultra-clear glass produced by the all-oxygen float process, including the stepped furnace bottom structure of the melting furnace described in Example 1. The embodiments of this invention have been described in detail above with reference to the accompanying drawings; however, this invention is not limited to the above embodiments. Even if various modifications are made to this invention, if these modifications fall within the scope of the claims of this invention and their equivalents, they shall still fall within the protection scope of this invention.

Claims

1. A stepped structure at the bottom of an oxygen-float ultra-white glass melting furnace, characterized in that, Including the bottom of the furnace, the glass melting furnace consists of a bubbling area, a clarifying area, and a bottleneck area along the flow direction of the molten glass, and the bottom of the furnace gradually rises from the bubbling area to the bottleneck area; The kiln bottom has a lifting step in the bubbling area, and there are 1 to 3 lifting steps from the bubbling area to the clarification area.

2. The stepped structure of the kiln bottom of the all-oxygen flotation ultra-white glass melting furnace according to claim 1, characterized in that, The lifting step of the kiln bottom in the bubbling area is the first lifting step, and the lifting height value A of the first lifting step is 20~200mm.

3. The stepped structure of the kiln bottom of the all-oxygen flotation ultra-white glass melting furnace according to claim 1, characterized in that, The kiln bottom is provided with three lifting steps from the bubbling area to the clarification area.

4. The stepped structure of the kiln bottom of the all-oxygen flotation ultra-white glass melting furnace according to claim 3, characterized in that, The three lifting steps from the bubbling area to the clarification area are, in sequence, a second lifting step, a third lifting step, and a fourth lifting step. The lifting height value B of the second lifting step is 20~200mm, the lifting height value C of the third lifting step is 20~200mm, and the lifting height value D of the fourth lifting step is 20~200mm.

5. The stepped structure of the kiln bottom of the all-oxygen flotation ultra-white glass melting furnace according to claim 1, characterized in that, The kiln bottom is provided with a lifting step in front of the bottleneck area.

6. The stepped kiln bottom structure of the all-oxygen flotation ultra-white glass melting furnace according to claim 5, characterized in that, The lifting step of the kiln bottom in front of the bottleneck area is the fifth lifting step, and the lifting height E of the fifth lifting step is 20~200mm.

7. A melting furnace for ultra-white glass using the all-oxygen flotation method, characterized in that, Includes the stepped kiln bottom structure for an oxygen-float ultra-white glass melting furnace as described in any one of claims 1 to 6.

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