降低锅炉烟气氮氧化物排放浓度试验研究  

Experimental Study on Reducing NOx Emission Concentration of Boiler Flue Gas

作　　者：王鹏 尹萍 刘有聪 闵超 Wang Peng;Yin Ping;Liu Youcong;Min Chao(Honghe Cigarette Factory of Hongyun Honghe Group,Mile 652399,China)

机构地区：[1]红云红河集团红河卷烟厂,云南弥勒652399

出　　处：《科学技术创新》2022年第28期17-20,共4页Scientific and Technological Innovation

摘　　要：过研究NOx生成途径以及对生成的NOx进行吸收,通过不同的对比试验,研究如何降低烟气氮氧化物排放浓度。研究发现,通过降低二次风频率和送风频率可以有效降低NOx排放浓度,降幅约为20%,通过在烟气中加入强氧化剂臭氧可以将烟气中难溶于水的低价位氮氧化物氧化成高价位氮氧化物,进一步被溶液吸收,此试验NOx排放浓度降幅约为10%,综合两种方式,在能保障好正常生产前提下,牺牲适当的燃烧效率,综合降低送风量和二次风量到极限值,同时结合添加最宜浓度臭氧措施,烟气中NOx折算值平均降幅可以达到约30%。Studies how to reduce the emission concentration of NOx in flue gas by studying the generation path of NOx and absorbing the generated NOx, and through different comparative tests. It is found that reducing the secondary air frequency and air supply frequency can effectively reduce the NOx emission concentration by about 20%. By adding strong oxidant ozone into the flue gas, the low-level nitrogen oxides that are difficult to dissolve in water can be oxidized into high-level nitrogen oxides, which can be further absorbed by the solution. The NOx emission concentration in this test decreases by about 10%. Combining the two methods, the appropriate combustion efficiency can be sacrificed on the premise of ensuring normal production, By comprehensively reducing the supply air volume and secondary air volume to the limit value, combined with the measures of adding the most appropriate concentration of ozone, the average reduction of NOx conversion value in flue gas can reach about 30%.

关 键 词：氮氧化物 燃煤锅炉 烟气排放 

分 类 号：X701[环境科学与工程—环境工程]