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高温空气燃烧技术中,在燃气喷口两侧布置矩形空气喷口,且矩形空气喷口的长轴指向燃气喷口,有利于在炉膛内形成低氧、低燃气浓度的高温燃烧环境。本文利用计算流体力学软件研究了矩形空气喷口长宽比在高温空气燃烧过程中对NOx排放的影响。研究结果表明,在本文所研究的炉膛结构条件下,矩形空气喷口长宽比为1.5、空气喷口与燃气喷口的间距为43 mm时,NOx排放能够得到有效的控制。
In the high-temperature air combustion technology, rectangular air vents are arranged on both sides of the gas vents, and the long axis of the rectangular air vents points to the gas vents, which is favorable for forming a high-temperature combustion environment with low oxygen concentration and low gas concentration in the furnace. In this paper, computational fluid dynamics software was used to study the effects of aspect ratio of rectangular air vents on NOx emission during high temperature air combustion. The results show that NOx emission can be effectively controlled under the condition of the furnace structure studied in this paper when the aspect ratio of the rectangular air nozzle is 1.5 and the distance between the air nozzle and the gas nozzle is 43 mm.