Characteristics of Full Oxygen Combustion Glass Kilns

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Application and Development of Oxygenation Combustion Technology in the Glass Industry

The combustion mode of full oxygen combustion (also known as pure oxygen combustion) technology is fuel+oxygen, eliminating the high energy consumption and NOX pollution factors caused by nitrogen in air assisted combustion technology. With the development of oxygen production technology and the reduction of electricity costs, pure oxygen combustion technology composed of oxygen and fuel has become a better choice to replace conventional combustion methods composed of air and fuel in glass melting furnaces. This is because pure oxygen combustion has unique advantages in environmental protection, energy conservation, output, quality, reducing equipment investment, and saving factory space.

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Characteristics of Full Oxygen Combustion Glass Kilns

Firstly, compared to traditional air assisted kilns, the all oxygen combustion glass kiln no longer has a large volume and excessive refractory material storage chamber, but instead has a simpler flue structure.

Secondly, there are essential differences in the structure and material of the large arch section. The large arches of traditional air assisted kilns are mostly made of silica bricks, which are mainly constructed with crushed stones. The thickness of silica bricks is mostly 300-500 mm, and the mud joints are 1-2 mm. Full oxygen combustion kilns mostly use electric melted bricks as the main material for the large arch, with electric melted AZS, α – β, and β as the main materials. They adopt a pre assembly mode, with a single ring without biting debris and dry masonry without mud joints. three

Common Problems with Oxygenation Combustion

The main problems currently encountered in oxy fuel glass kilns are:

① The glass quality cannot meet the design requirements; ② The energy consumption level cannot meet the design specifications; ③ The lifespan of the kiln is short and cannot achieve the economic target; ④ In terms of environmental protection, some projects have difficulty meeting NOX standards; ⑤ In terms of production safety, there have been incidents such as explosions, backfire and combustion of valve groups; ⑥ In terms of kiln safety: collapse of large arches; Leakage of materials from pool walls, flow holes, and feeding ports; Burning through the chest wall; Leakage of material at the bottom of the pool. In terms of kiln construction, only the construction of different parts such as large arches is explained. Compared to traditional air assisted kilns, the large arch of an all oxygen combustion kiln is dry masonry, without mud joints, and does not bite the slag structure. Therefore, once a problem occurs, it is fatal to the kiln. From the ranking of kiln safety, the severity of the problems is ranked as follows: ① collapse of the large arch and leakage of materials at the bottom of the pool; ② Leakage of materials in the pool wall, flow hole, feeding port, working pool or distribution channel; ③ Gables, parapets, flues, and hanging hooks for fire penetration; ④ Corrosion and leakage of material in the material channel and feeder. In the treatment of large arches, the special characteristics of dry laid large arches in brick and steel structures determine that any problems in any part are almost irreparable. So the masonry of the arch of the fully oxygen combustion kiln is even more crucial and should be given special attention. four