SCR烟气脱硝工艺喷氨混合装置研究进展.pdfVIP

学兔兔 化 工 进 展 2015年第34卷第12期 CHEMICAL 1NDUSTRY AND ENGINEERING PROGRESS ·4151· SCR烟气脱硝工艺喷氨混合装置研究进展 韩发年，闫志勇 (中国计量学院，浙江 杭州 310018) 摘要：氨法选择性催化还原技术(SCR)因其优良的综合性能而成为工程应用最为广泛的烟气脱,gzr_艺，而反应 器横截面上混合气体流场均匀性优劣是高效烟气脱硝的重要影响因素。本文简述了SCR烟气脱硝系统基本原理 和 NH3／NOx混合效率指标；综述了线性控制式、分区控制式和混合型喷氨格栅等几种工程应用上主流技术及其 必威体育精装版研究成果，并分析了各气体流场均匀性调节技术的优缺点；最后指出氨喷射混合装置未来的发展趋势：① 优先选用混合型喷氨格栅，分区控制式喷氨格栅和线性控制式喷氨格栅分别次之：②喷氨混合装置设计时重点 寻求降低浓度不均匀系数的可行性；③研发简易、高能和稳定的静态混合结构，降低建设和运行成本，提高操 作弹性；④完善还原剂氨喷射效应和喷氨量现代控制理论。 关键词：氮氧化物；烟气脱硝；选择性催化还原；喷射混合；均匀分布 中图分类号：TQ 534．9 文献标志码：A 文章编号：1000—6613(2015)12—4151—07 DoI：10．16085~．issn．1000-6613．2015．12．004 Advances in ammonia inj ection and mixing device of SCR-DeNOx system HANFanian，YANZhiyong (China Jiliang University，Hangzhou 310018，Zhejiang，China) Abstract：Selective catalytic reduction(SCR)by ammonia process has been the most extensive engineering application of denitrification technology due to its excellent comprehensive performance．The uniformity of the mixed gas flow field ratio on the lateral section ofthe SCR reactor is a key factor affecting denitfification efficiency．This review represents the basic principle of SCR as well as the mixing efficiency index of NHs／NO~．The methods and recent work on mainstream technology of the engineering application were reviewed，such as linear controlled injection grid，divisional controlled injection grid，and mixed element type ofinjection d．The advantages and disadvantages ofdifferent methods were analy