全尺寸SCR烟气脱硝评价系统的研发

摘要

全尺寸SCR烟气脱硝评价系统是以天然气燃烧尾气为基础模拟实际工程的烟气条件,相比电加热升温更加贴近工况条件;利用NH3催化氧化实现了NO气体的供给,大幅度降低了运行成本;整套系统可实现烟气温度、风量、污染物浓度可调.实验结果表明:空速、NO浓度和系统温度波动较小,长时间稳定运行,且SO2浓度的改变可以敏感地反映到脱硝效率上,因此适合对全尺寸蜂窝SCR催化剂进行活性评价,研究工业催化剂运行过程中遇到的各种问题.%A full-scale evaluation system used for the selective catalytic reduction (SCR) could simulate the actual flue gas conditions in the basis of natural gas combustion,which was more closely to the actual operating condition.The NO supply was realized by NH3 catalytic oxidation,which could significantly reduce the operation cost.In this system,flue-gas temperature,gas flow,pollutant concentrations could be easily adjusted.The results showed that space velocity,NO concentration and system temperature had small variation and the system running was stable for long time.And furthermore,NO removal efficiency was be sensitive to the SO2 concentration change.Above all,the system was suitable for measuring the SCR catalysts and researching the problems in industrial catalysts running.