Total-oxygen float ultra-white glass melting furnace and flame space thereof

Abstract

The utility model discloses an all-oxygen float ultra-white glass melting furnace and a flame space thereof, the all-oxygen float ultra-white glass melting furnace comprises a front face wall, breast walls positioned on two sides, a furnace tank containing molten glass at the bottom and a crown at the top of the furnace, a plurality of combustion components are arranged in the breast walls on the two sides, and the combustion components are used for jetting flames; the height value A of the breast wall ranges from 1300 mm to 1700 mm. The utility model provides a series of innovative flame space optimization measures aiming at the phenomena that the temperature difference between a liquid surface and a pool bottom is reduced due to the specific physical characteristics in the ultra-white glass production process, namely the excellent diathermancy of the ultra-white glass, the convection current of molten glass in the depth direction is weakened, and the flow velocity in the horizontal direction is increased. By means of the measures, the quality of the molten glass is remarkably improved, and the operation efficiency and safety of the melting furnace are greatly improved.

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 flame space. 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 furnaces and traditional cross-flame furnaces 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.

[0005] The melting system of a float glass melting furnace typically consists of a melting section and a refining section, with the upper part being the flame space and the lower part being the furnace pool. The flame space is filled with hot flame gases supplied by a heat source. These flame gases not only use their own heat to melt the batch but also radiate heat to the molten glass, furnace walls, and furnace roof. Therefore, the structural design of the flame space has a crucial impact on the efficiency and quality of glass melting.

[0006] In oxy-fuel float glass melting furnaces, the design of the flame space is crucial to the overall thermal efficiency and product quality of the furnace. Oxy-fuel combustion technology uses pure oxygen instead of air to burn fuel during the glass melting process. This avoids the introduction of large amounts of nitrogen from the air, accelerates combustion, ensures complete combustion of the fuel, and reduces flue gas emissions and NOx formation, thus achieving energy conservation and emission reduction. However, an improperly designed flame space can lead to a series of problems.

[0007] In practical applications, some companies using oxy-fuel combustion technology to produce glass have encountered problems such as low thermal efficiency and high pollutant emissions due to improper flame space design. These problems not only affect glass production efficiency and product quality but also increase the company's operating costs and environmental burden. Utility Model Content

[0008] To address the aforementioned problems, the purpose of this invention is to provide an all-oxygen float ultra-clear glass melting furnace and its flame space. This flame space reduces heat consumption and enhances the melting capacity of the all-oxygen float ultra-clear glass melting furnace, producing high-quality ultra-clear glass and demonstrating the thermal efficiency and superiority of the all-oxygen float ultra-clear glass melting furnace.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows:

[0010] A flame space for an oxygen-float ultra-white glass melting furnace includes a front wall, breast walls on both sides, a furnace pool at the bottom containing molten glass, and a large arch at the top of the furnace. Several combustion components are installed in the breast walls on both sides, and the combustion components are used to spray flames. The height A of the breast walls is 1300-1700 mm.

[0011] According to one embodiment of the present invention, the vertical distance B between the inner wall of the breast wall on the same side and the inner wall of the kiln pool is 100-300mm.

[0012] According to one embodiment of the present invention, the combustion component is an oxygen-filled spray gun.

[0013] According to one embodiment of the present invention, the oxygen spray guns on both sides are arranged symmetrically in the melting zone before the hot spot and asymmetrically in the melting zone after the hot spot.

[0014] According to one embodiment of the present invention, the distance C between adjacent oxygen spray guns on the same side of the symmetrically arranged oxygen spray guns is 1300-1700 mm.

[0015] According to one embodiment of the present invention, the distance D between adjacent oxygen spray guns on the same side of the asymmetrically arranged oxygen spray guns is 2000-4000 mm.

[0016] Based on the same concept, this utility model also provides an oxygen-float ultra-white glass melting furnace, including the flame space for an oxygen-float ultra-white glass melting furnace as described in any one of the above.

[0017] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0018] This invention addresses the specific physical characteristics of ultra-clear glass production, namely, the reduced temperature difference between the liquid surface and the bottom of the tank due to its excellent heat permeability, and the weakened convection of the molten glass in the depth direction while increasing the flow velocity in the horizontal direction. It proposes a series of innovative flame space optimization measures. These measures not only significantly improve the quality of the molten glass but also greatly enhance the operating efficiency and safety of the melting furnace.

[0019] Because ultra-clear glass has good heat transmission, the temperature difference between the liquid surface and the bottom of the tank is reduced, leading to weakened convection in the depth direction of the molten glass. This invention, by precisely adjusting the height and width of the flame space, effectively guides the horizontal flow of the molten glass, increasing the flow velocity and thus shortening the residence time of the molten glass in specific sections. This change directly promotes the rapid removal of bubbles, significantly improving the clarification effect of the glass.

[0020] By optimizing the flame space structure, complete combustion of the fuel is ensured, providing sufficient heat for glass melting, refining, and homogenization. Simultaneously, unnecessary heat loss is reduced, making the melting process more efficient. This improvement not only increases the melting rate of the molten glass but also ensures the stability of the melt quality, laying a solid foundation for the production of high-quality ultra-clear glass.

[0021] The optimized flame space structure reduces thermal stress on the kiln structure, enabling the combination of refractory materials and steel structure to withstand long-term high-temperature working loads, thereby extending the service life of the kiln. This not only reduces maintenance costs but also improves the overall stability and reliability of the production line.

[0022] By optimizing the arrangement of the oxygen-filled lances, this invention achieves a more rational distribution of heating energy consumption. Adjusting the distance between adjacent oxygen-filled lances concentrates the main energy consumption in the melting zone before the hot spot, ensuring that the heat requirements of the melting process are met. This improvement results in clearer bubble boundaries, more prominent hot spots within the kiln, and a clear, mirror-like clarification zone, further enhancing the melting quality.

[0023] The implementation of this invention not only improves melting efficiency but also reduces unnecessary energy consumption by optimizing energy distribution. Simultaneously, the application of oxy-fuel combustion technology reduces emissions of pollutants such as nitrogen oxides, meeting environmental protection requirements and contributing to the sustainable development of the glass industry.

[0024] In summary, this invention, by optimizing the flame space structure and the arrangement of the all-oxygen torch, achieves a comprehensive improvement in the efficiency, quality, and safety of glass melting, while reducing energy consumption and environmental pollution. It has significant technical effects and broad application prospects. Attached Figure Description

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a front cross-sectional view of the present invention;

[0027] Figure 2 This is a frontal plan view of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Flame space; 2. Breast wall; 3. Inner wall of kiln; 4. All-oxygen spray gun; 5. Hot spot; 6. Large arch. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] Example 1

[0033] See Figures 1 to 2 The core of this utility model is to provide a flame space for an oxygen float glass melting furnace, including a front wall, breast walls 2 on both sides, a furnace pool at the bottom containing molten glass, and a large arch 6 at the top of the furnace. Several combustion components are provided in the breast walls 2 on both sides, and the combustion components are used to spray flames. The height A of the breast walls 2 is 1300-1700mm, which optimizes the height of the flame space 1. The vertical distance B between the inner wall of the breast wall 2 on the same side and the inner wall 3 of the furnace pool is 100-300mm, which optimizes the width of the flame space 1.

[0034] In this embodiment, the combustion assembly is an oxygen-filled spray gun 4. The oxygen-filled spray guns 4 on both sides are arranged symmetrically in the melting zone before the hot spot 5 and asymmetrically in the melting zone after the hot spot 5. The distance C between adjacent oxygen-filled spray guns 4 on the same side of the symmetrically arranged spray guns 4 is 1300–1700 mm. The distance D between adjacent oxygen-filled spray guns 4 on the same side of the asymmetrically arranged spray guns 4 is 2000–4000 mm.

[0035] Example 2

[0036] Another core aspect of this invention is to provide an all-oxygen float ultra-white glass melting furnace, including the flame space for the all-oxygen float ultra-white glass melting furnace described in Example 1.

[0037] This invention addresses the specific physical characteristics of ultra-clear glass production, namely, the reduced temperature difference between the liquid surface and the bottom of the tank due to its excellent heat permeability, and the weakened convection of the molten glass in the depth direction while increasing the flow velocity in the horizontal direction. It proposes a series of innovative flame space optimization measures. These measures not only significantly improve the quality of the molten glass but also greatly enhance the operating efficiency and safety of the melting furnace.

[0038] Because ultra-clear glass has good heat transmission, the temperature difference between the liquid surface and the bottom of the tank is reduced, leading to weakened convection of the molten glass in the depth direction. This invention, by precisely adjusting the height and width of the flame space 1, effectively guides the horizontal flow of the molten glass, increasing the flow velocity and thus shortening the residence time of the molten glass in specific sections. This change directly promotes the rapid removal of bubbles, significantly improving the clarification effect of the glass.

[0039] By optimizing the structure of flame space 1, complete combustion of fuel was ensured, providing sufficient heat for glass melting, clarification, and homogenization. Simultaneously, unnecessary heat loss was reduced, making the melting process more efficient. This improvement not only increased the melting rate of the molten glass but also ensured the stability of the melt quality, laying a solid foundation for the production of high-quality ultra-clear glass.

[0040] The optimized flame space 1 structure reduces thermal stress on the kiln structure, enabling the combination of refractory materials and steel structure to withstand long-term high-temperature working loads, thereby extending the service life of the kiln. This not only reduces maintenance costs but also improves the overall stability and reliability of the production line.

[0041] By optimizing the arrangement of the oxygen-filled lances 4, this invention achieves a more rational distribution of heating energy consumption. By adjusting the distance between adjacent oxygen-filled lances 4, the main energy consumption is concentrated in the melting zone before the hot spot 5, ensuring that the heat requirements of the melting process are met. This improvement makes the bubble boundary clearer, the hot spot 5 in the kiln more prominent, and the clarification zone clearer, further improving the melting quality.

[0042] The implementation of this invention not only improves melting efficiency but also reduces unnecessary energy consumption by optimizing energy distribution. Simultaneously, the application of oxy-fuel combustion technology reduces emissions of pollutants such as nitrogen oxides, meeting environmental protection requirements and contributing to the sustainable development of the glass industry.

[0043] In summary, by optimizing the structure of the flame space 1 and the arrangement of the all-oxygen spray gun 4, this invention achieves a comprehensive improvement in the efficiency, quality, and safety of glass melting, while reducing energy consumption and environmental pollution. It has significant technical effects and broad application prospects.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A flame space for an oxygen-float ultra-white glass melting furnace, characterized in that, It includes a front wall, breast walls on both sides, a furnace pool at the bottom containing molten glass, and a large arch on the top of the furnace. Several combustion components are installed in the breast walls on both sides, and the combustion components are used to spray flames. The height A of the breast wall is 1300-1700mm.

2. The flame space for an oxygen-float ultra-white glass melting furnace according to claim 1, characterized in that, The vertical distance B between the inner wall of the breast wall on the same side and the inner wall of the kiln pool is 100-300 mm.

3. The flame space for an oxygen-float ultra-white glass melting furnace according to claim 1, characterized in that, The combustion assembly is an oxygen-filled spray gun.

4. The flame space for an oxygen-float ultra-white glass melting furnace according to claim 3, characterized in that, The oxygen-filled spray guns on both sides are arranged symmetrically in the melting zone before the hot spot and asymmetrically in the melting zone after the hot spot.

5. The flame space for an oxygen-float ultra-white glass melting furnace according to claim 4, characterized in that, The distance C between adjacent oxygen spray guns on the same side of the symmetrically arranged oxygen spray guns is 1300-1700 mm.

6. The flame space for an oxygen-float ultra-white glass melting furnace according to claim 4, characterized in that, The distance D between adjacent oxygen spray guns on the same side of the asymmetrically arranged oxygen spray guns is 2000-4000 mm.

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

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