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对一种低热值煤层气燃烧器进行优化设计,在燃气管内设置导流叶片,并在旋流空气管和燃气管之间增加一根直流空气管,对此燃烧器进行冷态和热态实验,结果表明:改进后的燃烧器旋流强度沿中心轴线比原燃烧器下降平缓,在中心轴线相同位置处大于原燃烧器,改进后的燃烧器旋流强度最大值为0.53;改进后的燃烧器燃烧温度沿中心轴线比原燃烧器上升快,在中心轴线0.55 m处,温度达到最大值1 440 K;在相同热负荷下,温度峰值比原燃烧器更靠近喷口,且比原燃烧器大。原燃烧器火焰尾部温度高,火焰长,局部容积热强度低。
In this paper, a low calorific value coalbed methane burner is optimized, a guide vane is installed in the gas pipe, and a DC air pipe is added between the swirling air pipe and the gas pipe. The burner is subjected to cold state and hot state experiment The results show that the swirling intensity of the improved combustor descends smoothly along the central axis and is greater than that of the original combustor at the same position of the central axis. The improved swirling intensity of the combustor is 0.53. The improved combustion The burner temperature rises faster than the original burner along the central axis, reaching a maximum temperature of 1 440 K at a center axis of 0.55 m. At the same thermal load, the peak temperature is closer to the outlet than the original burner and is larger than the original burner . The original burner flame tail temperature is high, the flame is long, the local volume of low thermal strength.