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建立了豫兴Ⅱ型顶燃式热风炉燃烧室流动、传热、燃烧及辐射三维数学模型,对煤气在燃烧室内的燃烧进行了数值计算,对空、煤气混合燃烧过程中燃烧室内的流场、浓度场、温度场及火焰形状进行了分析。通过对实际热风炉的工业测试,验证了计算结果的正确性。结果表明:燃烧室出口处气体竖直方向最大速度与最小速度之比为1.1,蓄热室气流分布较均匀;燃烧室出口处烟气中CO最高浓度为510×10-6,煤气与空气混合良好,燃烧较充分;燃烧室出口截面上温差为6 K,温度分布较均匀;火焰在喷口出口处形成,燃烧火焰较短。
A three-dimensional mathematical model of flow, heat transfer, combustion and radiation in the combustion chamber of Yuxing Ⅱ top-fired hot blast stove was established. The combustion of the gas in the combustion chamber was numerically calculated. The flow field in the combustion chamber during the mixed combustion of air and gas was established. , Concentration field, temperature field and flame shape were analyzed. Through the industrial test of the actual stove, the correctness of the calculation results is verified. The results show that the ratio of the maximum velocity to the minimum velocity in the vertical direction of the gas at the exit of the combustion chamber is 1.1, and the distribution of air flow in the regenerator is more uniform. The maximum concentration of CO in the flue gas at the outlet of the combustor is 510 × 10-6. Good, burning more fully; the exit section of the combustion chamber temperature difference of 6 K, the temperature distribution is more uniform; the flame is formed at the exit of the nozzle, the combustion flame is shorter.