摘要
活性焦成本低、目标吸附物广、理化结构可控性强,可在80~150℃范围内,实现低温脱硝,具有重要的发展潜力。在固定床试验系统上,研究了NOx在活性焦表面的吸附和氧化特性,分析了不同原理的工程应用可行性;并在烟气量为10000m^3/h活性焦联合脱硫脱硝中试试验系统上验证了不同脱硝反应过程的性能。研究结果表明,活性焦脱硝存在四种反应过程,反应速率依次为:碳热还原>低温还原>高温还原>低温吸附,NO2的低温吸附性能优于NO,且NO2可在活性焦表面快速还原为NO。工程应用条件下,低温吸附过程的脱硝效率只有30%~40%,而低温还原过程的脱硝效率可达到80%,具有较高的工程应用可行性。
Activated coke has low cost, wide target adsorbate and strong physical and chemical structure controllability. It can achieve low temperature denitration in the range of 80~150℃ and has important development potential. A fixed-bed test system was set up to study the adsorption and oxidation characteristics of NOx on the surface of activated coke. The feasibility of engineering applications of different principles was analyzed. The 10000 m^3/h pilot test system for combined desulfurization and denitrification of activated coke used to verify the denitrification performance in different processes. The research results show that there are four reaction processes for denitration of activated coke. The reaction speed is: carbothermal reduction> low temperature reduction> high temperature reduction> low temperature adsorption. The performance of low temperature adsorption of NO2 is better than that of NO. Low-temperature adsorption reachs only 30%~40% denitration efficiency, and low-temperature reduction can meet the denitration efficiency of about 80%, which is feasible for engineering applications.
作者
李阳
杨成龙
车得福
姚明宇
蔡铭
王小成
LI Yang;YANG Chenglong;CHE Defu;YAO Mingyu;CAI Ming;WANG Xiaocheng(Xi´an Thermal Power Research Institute Co,Ltd,Xi'an 710032,Shaanxi Province,China;State Key Laboratory of Multiphase Flow for Power Engineering(Xi’an Jiaotong University),Xi'an 710049,Shaanxi Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第19期6264-6271,共8页
Proceedings of the CSEE
基金
国家重点研发计划项目(2017YFB0602900)。
关键词
活性焦
脱硝
吸附
还原
Activated coke
Denitrification
Adsorption
Reduction
