基于化学团聚铁矿烧结过程PM_(10/2.5/1.0)脱除研究

PM_(10/2.5/1.0) removal of iron ore sintering process based on chemical agglomeration

铁矿烧结工序是钢铁工业最大的PM_(10/2.5/1.0)排放源。提出基于化学团聚铁矿烧结过程PM_(10/2.5/1.0)脱除技术,研究了不同团聚剂种类及用量对其团聚效果的影响。结果表明,CMC(羧甲基纤维素钠)质量分数为0.05%,喷洒时间12 min(720~1 440 s区间)时,PM_(10)、PM_(2.5)、PM_(1.0)颗粒数脱除效率分别为39.87%、29.88%、22.85%。微细颗粒物团聚后,质量浓度峰值向PM_(10)粒级偏移,PM_(1.0)颗粒数大幅度降低。微细颗粒物团聚主要表现小颗粒被粘附在大颗粒表面以及多个小颗粒团聚在一起形成团聚体。

The iron ore sintering process is the largest source of PM_(10/2.5/1.0)emissions in the iron and steel industry.The technology of PM_(10/2.5/1.0)removal based on the chemical agglomeration using the sintering pot was carried out.The results show that the removal efficiency of PM_(10),PM_(2.5)and PM_(1.0)are 39.87%,29.88%and 22.85%respectively,under the conditions of CMC mass fraction of 0.05%and spraying time of 12 min(in the range of 720-1440 s).The peak value of mass concentration shifts to the PM_(10)and the number of particles of PM_(1.0)decreases sharply after the agglomeration.The agglomeration of fine particles mainly shows that small particles are adhered to the surface of large particles,and more small particles agglomerates the big particle.