【摘要】 高温低氧空气燃烧（HTAC）技术可有效降低NO_x的生成,在玻璃行业具有良好的应用前景。针对一实际尺寸的燃油浮法玻璃熔窑火焰空间建立模型进行了数值模拟,通过烟气回掺的方式使助燃空气中的O₂含量降为18%,分别对空气助燃（21%O₂含量）和高温低氧燃烧（18%O₂含量）两种工况进行了对比研究。结果表明:两种工况下气流流动形式相一致,但高温低氧燃烧时气流流量有所增加;高温低氧燃烧工况下的温度场与空气助燃时相比差异很小,表明玻璃熔制温度制度几乎不受影响;在高温低氧燃烧工况下,NO_x的生成量大幅度下降,最终烟气出口处NO_x的总质量流量与空气助燃时相比降低了41.4%,表明该技术对于降低玻璃熔窑中NO_x的生成量来说极为有利。更多还原

【Abstract】 The high temperature air combustion（ HTAC） technology,which is conducive to lower the production of NO_x,can be utilized in the float glass industry. Numerical simulation aiming at an actual oil fired float glass furnace was carried out. By mixing the flue gas into the pure combustion air,the O₂ content is reduced to 18%. A comparative study between air-fuel combustion（ 21% O₂） and high temperature air combustion（ 18% O₂） was executed. The results show that the gas flow form is the same in the two operating conditions,but the gas mass flow increases in the high temperature air combustion conditions. The difference of the temperature field between the two kinds of combustion atmospheres is minimal,indicating that the temperature schedule for glass melting is almost unaffected by utilizing the HTAC technology. However,the production of NO_x decreases greatly,with the total mass flow of NO_x at the exits of flue gas reduced by 41. 4% compared with that of the air combustion,showing that the technology is helpful to reduce the production of NOx in glass furnace.更多还原