摘要
针对气态悬浮焙烧炉烟气氮氧化物超低排放的生产需求,采用SNCR+SCR联合脱硝技术,用尿素溶液在一定的温度下通过催化剂作用,有选择性的还原烟气中的氮氧化物,转化为氮气和水蒸气,满足了达标排放的要求。同时针对气态悬浮焙烧炉烟气SCR脱硝反应器气流均布导流不均匀的技术难题,设计了一种天圆地方结构的气流均布导流装置,提高了烟气对催化剂入口的垂直角度,降低了流道之间的阻力不均匀性,保证了烟气在催化剂层达到最佳的催化反应和氮脱除效率。
In order to meet the production demand of ultra-low emission of nitrogen oxides in flue gas of gas suspension calciner,SNCR+SCR combined denitrification technology was adopted,and urea solution was used as catalyst at a certain temperature to selectively reduce nitrogen oxides in flue gas into nitrogen and water vapor,which met the requirements of discharge standards.At the same time,aiming at the technical problem of uneven airflow distribution and diversion in the SCR denitrification reactor of gas suspension calciner flue gas,a uniform airflow distribution and diversion device with a circular and local structure was designed,which improved the vertical angle of flue gas to the catalyst inlet,reduced the uneven resistance between flow channels,and ensured the best catalytic reaction and nitrogen removal efficiency of flue gas in the catalyst layer.
作者
时新江
Shi Xinjiang(Henan Huahui Nonferrous Engineering Design Co.,Ltd.,Zhengzhou 450041,China)
出处
《轻金属》
2025年第3期59-62,共4页
Light Metals
关键词
氮氧化物
尿素
催化剂
导流装置
nitrogen oxides
urea
catalyst
diversion device
