7MW工业炉内燃油喷雾燃烧过程的模拟研究

Numerical Simulation of Fuel Oil Spray Combustion Process Inside a 7 MW Industrial Furnace

对7MW的圆柱形工业炉内燃油喷雾燃烧过程进行模拟研究。模拟采用商业CFD软件Fluent对熔炉中的传热传质及反应过程进行建模。研究结果表明,通过燃烧器参数(相对空燃比,料滴直径,燃料喷雾半角)可以优化燃油喷雾燃烧状态。这些参数通过影响火焰的形状和稳定性,火焰的形状和稳定性最终将影响工业炉的性能,特别是加热功率和气体种类的排放。通过模拟发现高涡流,较宽的燃料喷射角和较小的燃料滴,可实现燃料的完全燃烧。同时窄的燃料喷雾角,小的燃料滴,可实现工业炉的高效热输出。

A simulation study of the fuel spray combustion process in a 7 MW cylindrical industrial furnace is carried out. The simulation uses commercial CFD software Fluent to model the heat and mass transfer and reaction process in the furnace. The research results show that the fuel spray combustion state can be optimized by changing the fuel and burner parameters(relative air-fuel ratio, fuel droplet diameter, fuel spray half-angle). These parameters affect the shape and stability of the flame. The shape and stability of the flame will ultimately affect the performance of the industrial furnace, especially the heating power and the emission of gas types. Through simulation, it is found that high vortex, wider fuel injection angle and smaller fuel droplets can achieve complete fuel combustion. At the same time, the narrow fuel spray angle, and the small fuel droplets can realize the high-efficiency heat output of the industrial furnace.