烧结烟气低温SCR脱硝中试研究

The Pilot-scale Test on Low Temperature SCR De-nitration of Sintering Flue Gas

该文使用针对烧结烟气特性定制的催化剂,通过中试试验对低温SCR脱硝技术进行了研究,研究测试了反应温度、空速及氨氮比对脱硝效率的影响,同时对催化剂进行了长达40 d的性能稳定性测试,得到空速3 200 h-1,反应温度230℃,氨氮比控制在1~1.05的条件下,脱硝效率可稳定保持在85%以上,从而验证了搭载此定制催化剂的低温SCR脱硝技术可以长期、稳定地实现烧结烟气氮氧化物超低排放的要求。

Containing of the feature of sintering flue gas,this paper did a pilot-scale test on low temperature SCR de-nitration of sintering flue gas with special catalyst to research that the temperature,space velocity and ammonia-nitrogen ratio are important factors affecting the de-nitrification efficiency.The stability test of the special catalyst for 40 days verified that the conditions of space velocity as 3 200 h-1,the temperature as 230℃,the ammonia-nitrogen ratio as 1~1.05,can keep the de-nitrification efficiency above 85%stably,it also can verified that the low-temperature SCR de-nitrification could realize the ultra low emission of nitrogen oxide in the sintering process steadily on a long-term basis.