烟气循环烧结过程风氧平衡

Wind and Oxygen Balance Based on Flue Gas Circulation Sintering Process

与普通烧结相比,烟气循环烧结工艺拥有节能减排和清洁生产的优势。为此,重点研究了烟气循环烧结过程风氧平衡规律,旨在保证烧结产质量指标的前提下,进一步提高烟气循环率,根据理论计算结合实测对烟气循环烧结过程风氧平衡进行了研究。研究结果表明:烧结机的中前部和尾部几个风箱的烟气具有低硫、氧含量高、温度较高的特点,可以作为循环烟气,与部分高温环冷废气均匀混合后,在保证烧结进风氧气体积分数18%以上的前提下,通过优化调节主抽风量、漏风率和烧结耗氧量等,可以实现烟气循环率达到43%,为烟气循环烧结工艺的发展提供了理论指导。

Compared with ordinary sintering process, flue gas circulation sintering process has the advantages of energy savings and pollutant reductions. The change regularity of wind and oxygen balance during gas circulation sintering is focused on studying, and the emphasis is to further improve the flue gas circulation rate. It uses the method of combining theoretical calculation with measured results. The results show that flue gas of several bellows in the front and rear of sintering pallet with the characteristics of lower sulfur, higher oxygen content and higher temperature can be used as circulating flue gas, the flue gas and ring cold gas can be mixed uniformly by special gas mixing chamber. In the premise of insuring the volume percent of oxygen inlet gas exceeding 18%, flue gas circulation rate can reach to 43% by optimizing adjustment of main pumping air volume, air leakage rate and oxygen consumption of sintering. The theoretical guidance for the development of flue gas circulation sintering process can be provided.