雾化介质对燃油加热炉内流动和燃烧的影响

IMPACT OF ATOMIZING MEDIUM ON FLOW AND OIL COMBUSTION IN FURNACE

利用数值模拟方法,选用标准的k-ε湍流模型、液雾喷射燃烧模型、离散坐标辐射传热模型,研究了雾化介质由高温蒸汽改成常温空气后对燃油常压炉内燃烧状况的影响,主要考察了炉内速度场、温度场、燃料和氧化剂的浓度场以及加热炉的热效率的变化。研究结果表明,将蒸汽雾化改成空气雾化的方案是可行的,不会引起加热炉操作和运行的较大变化,有利于提高加热炉热效率。

Through numerical simulation and by κ-ε turbulent model, oil spray combustion model and discrete ordinate transfer radiation model, the impact of using ambient air as atomizing medium instead of hightemperature steam on the combustion in the furnace of atmospheric distillation unit was studied and velocity, temperature, concentration of fuel and oxygen and the changes of heat efficiency of furnace were investigated. The results demonstrate that the utilization of air as atomizing medium rather than steam is technically feasible and will not lead to great changes in furnace operation. It is favorable for improving furnace heat efficiency.