脱硝技术的现状及展望

为了总结脱硝技术的研究成果,找出脱硝技术的发展趋势,创建我国具有自主知识产权的脱硝技术体系,分析了国内外脱硝技术的现状,介绍了干法和湿法烟气脱硝技术的各种工艺,指出现阶段技术最成熟的脱硝工艺是选择性催化还原(SCR),但选择性非催化还原(SNCR)、等离子体、氧化和吸收等工艺也具有非常好的前景。研究了大量脱硝技术的特点,指出作为脱硝主流技术的SCR工艺研究将集中在优化工艺流程、研发高性能SCR催化剂、SCR催化剂寿命延长和再生技术;基于不同脱硝机理的不同脱硝工艺的结合或联用是脱硝技术的一个重要发展方向;加大研发联合脱硝和脱硫的工艺;创新脱硝机理、多级或多段复合脱硝工艺以及可再生循环使用的新型脱硝催化剂和吸附剂将成为研究热点。 In order to summarize the research achievements and elucidate the development trend of denitration techniques,as well as to establish a systematic denitration technology with proprietary intellectual property rights in China,this paper overviewed the current progress of domestic and foreign denitration techniques,and introduced several typical dry and wet processes of flue gas denitration technology.Accordingly,the most mature denitration process is the selective catalytic reduction denitration( SCR) process,while the selective non catalytic reduction( SNCR),plasma technology,oxidation and absorption processes also have a certain prospect and potential. As the mainstream denitration process,the improvement of SCR technique will mainly focus on the process optimization,high performance SCR catalyst development,catalyst life extension,and catalyst regeneration. The combination or integration of different denitriation processes based on different mechanisms is one of the important developing directions of denitration technology,and the process combining denitration and desulfurization processes should be researched.The innovation of denitration mechanism,integration of multi-stage or multi section,and development of novel recycling and regenerating denitration catalyst and adsorbents will become hot topics in this field