Float glass surface coating device and use method

Abstract

The invention relates to the technical field of float glass production, and provides a float glass surface coating device. The float glass surface coating device is provided with a left gas control box, a right gas control box, an upper spraying device and a lower spraying device, wherein SO2 gas and N2 or air gas respectively enter the gas control box through the inlet of the gas control box, then the gases are mixed and heated and then are conveyed to the main gas inlet pipe of the upper spraying device and the lower spraying device through a pipeline with a heat preservation function, the main gas inlet pipe is divided into a left sprayer main gas inlet pipe and a right sprayer main gas inlet pipe by spraying device blind spots in the middle of the main gas inlet pipe, and a protective gas enters the spraying device from the main gas inlet pipe, flows through a spraying device connecting pipe and a spraying device nozzle pipe and is finally sprayed to the surface of the glass through a nozzle to form a protective layer. According to the invention, the protective gas and the glass plate can fully react to form a uniform protective film layer with enough thickness, so that scratches and tin defects on the upper and lower surfaces of the glass are effectively controlled, and the quality of the float glass is improved.

Description

technical field [0001] The invention belongs to the field of float glass production, and in particular relates to a float glass surface coating device and a use method. Background technique [0002] During the production process of float glass, the glass plate is annealed and formed, packaged, transported, and delivered to downstream customers for further processing. The glass surface is in contact with annealing kiln rollers, tin oxides, dust particles, glass wrapping paper, etc. Glass surface defects such as tin staining and scratches occur, which seriously affect the yield of glass. [0003] After research and testing and comparison with foreign float glass surface coatings, domestic float glass surface coatings are thin and unevenly distributed, and the uniformity and compactness of domestic float glass surface coatings are comparable to foreign products. There are obvious differences, which is an important factor restricting the quality of domestic float glass. After ...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. Only the lower surface of the glass surface is sprayed, and there is no spraying on the upper surface; 2. The distance between the spraying hole and the glass plate is fixed, and there is no adjustment of pressure and flow, which cannot meet the requirements of the spraying process; 3. Spray gas SO 2 4. The angle between the protective gas sprayed from the spray hole and the glass plate cannot be adjusted and controlled according to the process; 5. The sprayed protective gas is pure SO 2 , the flow rate and pressure are too small to meet the process requirements, if adjusted, it will cause SO 2 Poisoning and environmental pollution; 6. The uniformity and compactness of the inorganic salt protective layer on the surface of the glass plate cannot be guaranteed

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