The exhaust gas temperature of SOFC is as high as 600–1000 °C and contains combustible components that can be reused. In this paper, an experimental system was set up to study the combustion characteristics of SOFC simulated exhaust gas in a porous medium burner, the combustion of SOFC exhaust gas under different equivalence ratio, the effects of hydrogen concentration and water vapor fraction in the anode exhaust gas and the stable combustion limits of the burners had been analyzed. Results showed that: equivalence ratio and adiabatic flame temperature had a significant effect on the combustion, when the adiabatic flame temperature of mixed gas below 440 °C, or the water vapor content in the anode gas was greater than 85%, the flame couldn’t be stably burned; On the condition of the fuel utilization rate of 60% and the equivalence ratio of 0.40, the burner could burn stably with the inlet airflow velocity from 0.16 to 0.24m/s; The combustion stability limit of the exhaust gas burner varied with the utilization ratio of the stack, with increasing of fuel utilization ratio, the equivalence ratio of lifting and flashback limit was changing, and the adiabatic flame temperature of stable combustion limit had been studied.

SOFC的废气温度高达600–1000°C，并且包含可重复使用的可燃成分。本文建立了一个实验系统，研究了多孔介质燃烧器中SOFC模拟废气的燃烧特性，不同当量比下SOFC废气的燃烧，阳极废气中氢浓度和水蒸气分数的影响。分析了燃气和燃烧器的稳定燃烧极限。结果表明：当量比和绝热火焰温度对燃烧有显着影响，当混合气体的绝热火焰温度低于440°C或阳极气体中的水蒸气含量大于85％时，火焰无法燃烧。被稳定地燃烧；在燃油利用率为60％，当量比为0.40的条件下，燃烧器能以0.16至0.24m / s的进气速度稳定燃烧。废气燃烧器的燃烧稳定性极限随烟囱利用率的变化而变化，随着燃料利用率的提高，升，闪极限的当量比发生变化，并研究了稳定燃烧极限的绝热火焰温度。