臭氧氧化脱硝技术研究进展

doi:10.11949/j.issn.0438-1157.20171596

摘要/Abstract

摘要：

区别于还原法脱硝技术，臭氧氧化脱硝技术将NO氧化为易溶于水的NO₂和N₂O₅等，结合后续吸收工艺进行脱硝。臭氧氧化脱硝技术已经广泛应用于催化裂化、工业锅炉烟气NO_x排放控制。结合臭氧氧化技术的工艺特点及反应动力学，分析了复杂烟气组分中NO氧化的选择性，重点关注臭氧与NO摩尔比、反应温度和停留时间等关键工艺参数对氧化产物组成的影响。通过阐述湿法与半干法脱硫工艺中的硫硝协同吸收原理，分析吸收剂、吸收气体组成、添加剂等因素对吸收效率的影响。在此基础上，提出臭氧氧化脱硝技术研究中存在的不足以及此技术未来的发展前景。

关键词: 烟气, 氮氧化物, 氧化, 吸收, 脱硝

Abstract:

Ozone oxidation denitrification technology first oxidizes NO into water-soluble nitrogen oxides such as NO₂ and N₂O₅, followed by absorption process for denitration, which is different from reduction denitration technologies. It has been widely used in NO_x emission control of catalytic cracking and industrial boiler flue gases. The technological characteristics and reaction kinetics of ozone oxidation denitrification technology were discussed, the oxidation selectivities of NO in complex flue gases were analyzed, and the effects of ozone and NO molar ratio, reaction temperature and residence time on the composition of oxidation products were studied. After that, the influence of absorbents, absorption gas compositions and additives on absorption efficiencies was analyzed by elaborating the principle of synergistic absorption of sulfur dioxide and nitrogen oxides in both wet and semi dry desulfurization processes. Based on the above discussion, the deficiencies in the research of ozone oxidation denitration technology were put forward and the future development of this technology was proposed.

Key words: flue gas, NO_x, oxidation, absorption, denitrification

中图分类号:

X511

纪瑞军, 徐文青, 王健, 严超宇, 朱廷钰. 臭氧氧化脱硝技术研究进展[J]. 化工学报, 2018, 69(6): 2353-2363.

JI Ruijun, XU Wenqing, WANG Jian, YAN Chaoyu, ZHU Tingyu. Research progress of ozone oxidation denitrification technology[J]. CIESC Journal, 2018, 69(6): 2353-2363.

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