Effect of oxygen enriched conditions on sintering ignition of low calorific value gas
LIU Qian1, ZHOU Hao-yu1,2, PEI Yuan-dong3, LI Qian1,4, LIU Tong3, WANG Ye-feng1
1. National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian in Ternational Engingeering Co., Ltd., Changsha 410205, Hunan, China; 2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China; 3. Before Ironmaking Management Center, Zhongtian Iron and Steel Group Co., Ltd., Changzhou 213100, Jiangsu, China; 4. College of Energy Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
Abstract:Aiming at the problem of poor ignition quality caused by low combustion temperature of low calorific value gas, the combustion process of low calorific value gas was simulated by GRI-Mech3.0, which was a detailed mechanism describing the chemical kinetics of hydrocarbon flame combustion. The effects of oxygen enriched conditions on combustion temperature, oxygen concentration and combustion rate of low calorific value gas were studied. The industrial test of oxygen enriched ignition technology for low calorific value gas was carried out. The results showed that using oxygen rich air as combustion supporting agent can significantly improve the ignition temperature of low calorific value gas and improve ignition effect. When the oxygen volume fraction of combustion supporting air was increased to 0.23, the ignition effect of pure blast furnace gas could be improved to the same as that of using air and mixed gas. Further increasing the oxygen content of combustion supporting air could reduce the ignition energy consumption of sintering, and increase the quality of surface sinter accordingly. Industrial test shows that oxygen enriched condition is an effective way to realize high quality and low consumption ignition of low calorific value gas. It has positive significance to reduce ignition energy consumption in sintering process.
刘前, 周浩宇, 裴元东, 李谦, 刘桐, 王业峰. 富氧条件对低热值燃气烧结点火的影响[J]. 中国冶金, 2021, 31(7): 57-62.
LIU Qian, ZHOU Hao-yu, PEI Yuan-dong, LI Qian, LIU Tong, WANG Ye-feng. Effect of oxygen enriched conditions on sintering ignition of low calorific value gas[J]. China Metallurgy, 2021, 31(7): 57-62.