摘要
为实现铁矿烧结烟气SO_2和NO_x协同减排,采用氨法联合活性炭对烧结烟气进行协同脱硫脱硝研究。结果表明,在经氨法预先脱除SO_2后,仅凭活性炭单级吸附就能获得70%以上的脱硝率。氨法联合活性炭法脱硝的机理是由于逃逸的NH_3与活性炭表面的C-OH官能团结构发生化学吸附反应,最终生成了N_2和H_2O。针对目前已有氨法脱硫装置的烧结厂而言,只需在脱硫喷淋塔后直接连接单级活性炭吸附塔,即可达到99%以上的脱硫率和70%以上的脱硝率,不仅可大幅降低设备投资成本,还可解决氨的逃逸和二次环境污染的问题。
In order to reduce the emission of SO2 and NOx in the iron ore sintering,the desulfurization and denitration of iron ore sintering flue gas based on ammonia-activated carbon process was developed. The results show that more than 70% denitration rate was obtained using activated carbon after SO2 was removed by ammonia process. The denitration mechanism is that the escaping NH3 reacted with C-OH in the surface of activated carbon to produce the N2 and H2O. For the sintering plants using ammonia desulfurization process,more than 99% desulfurization rate and 70% denitration rate were achieved just connecting a single stage activated carbon adsorption tower after the desulfurization spray tower,which could reduce the capital cost and also solve the secondary environmental pollution due to the NH3 escape.
出处
《钢铁》
CAS
CSCD
北大核心
2017年第12期91-97,共7页
Iron and Steel
基金
柳州市环境保护专项基金资助项目(LZHB2011-01)
关键词
铁矿烧结
烟气
氨法
活性炭
脱硫脱硝
iron ore sintering
flue gas
ammonia
activated carbon
desulfurization and denitration