氧化铝焙烧炉采用SNCR技术脱硝改造实践  

Practice of SNCR Technology for Denitrification of Alumina Roasting Furnace

作　　者：李韶辉 刘张友 张放 王志 刘希武 LI Shaohui;LIU Zhangyou;ZHANG Fang;WANG Zhi;LIU Xiwu(Vocational College of Shandong Aluminium Co.,Ltd.,Zibo 255060,China;Chinalco of Shandong Co.,Ltd.,Zibo 255051,China;Chinalco Shandong Engineering Technology Co.,Ltd.,Zibo 255051,China)

机构地区：[1]山东铝业职业学院,山东淄博255060 [2]中铝山东有限公司,山东淄博255051 [3]中铝山东工程技术有限公司,山东淄博255051

出　　处：《山东冶金》2022年第4期65-66,70,共3页Shandong Metallurgy

摘　　要：山铝氧化铝焙烧炉采取非选择性催化还原(SNCR)技术进行脱硝改造,选用含有NHx基的尿素作为脱硝还原剂,尿素溶液管道全程蒸汽伴热并保温,对尿素溶解存储系统进行区域化整合。实践结果表明,改造后焙烧炉烟气脱硝效率达到50%,氮氧化合物(NOx)减排量480 t/a,排放浓度符合重点控制区排放浓度限值100 mg/m^(3)的标准要求。Nonselective catalytic reduction(SNCR)technology is adopted for the alumina roaster of Chinalco Shandong Co.,Ltd.to carry out denitrification transformation.Urea containing NHx group is selected as denitrification reducing agent,and steam tracing and heat preservation are carried out throughout the urea solution pipeline,and regional integration of urea dissolution storage system is carried out.The results show that the denitrification efficiency of flue gas reaches 50%,the NOx emission is reduced by 480 t/a,and the emission concentration meets the standard requirement of 100 mg/m^(3) emission concentration limit in key control area.

关 键 词：氧化铝焙烧炉 SNCR脱硝 NOx减排量 排放浓度限值 

分 类 号：X758[环境科学与工程—环境工程]